FH: 00478466 Roccella fimbriata Darbishire Mexico: Baja California Norte Guadalupe Island: [data not captured] H. L. Mason 1925-4
Adiantaceae GH: 00518244 Myriopteris peninsularis insularis (Weatherby) Grusz & Windham Mexico: Colima Revillagigedo Islands, Socorro Island, above... H. L. Mason 1616 1925-5-4
Aneuraceae FH: 00494816 Aneura latifrons (Lindberg) Stephani USA: California [data not captured] H. L. Mason 2499 1925-11-26
FH: 00494900 Aneura pinnatifida (F. Weber) Dumortier USA: California [data not captured] H. L. Mason 2263 1925-10-25
Anthocerotaceae FH: 00508286 Phaeoceros laevis carolinianus (Michaux) Proskauer USA: California [data not captured] H. L. Mason 2514 1925-11-26
Asteraceae GH: 00007313 Ageratina ciliata (Lessing) King & H. Robinson Mexico: Colima Socorro Island, Revillagigedo Islands. H. L. Mason 1666 1925-5-8
GH: 00007313 Ageratina pacifica (B. L. Robinson ex I. M. Johnston) King & H. Robinson Mexico: Colima Socorro Island, Revillagigedo Islands. H. L. Mason 1666 1925-5-8
GH: 02141552 Agoseris heterophylla (Nuttall) Greene USA: California [data not captured] H. L. Mason 2155 1925-7-10
GH: 00004444 Brickellia peninsularis amphithalassa B. L. Robinson Mexico: Colima Clarion Island, Revillagigedo Islands H. L. Mason 1555 1925-4-26
A: 00004445 Brickellia peninsularis amphithalassa B. L. Robinson Mexico: Colima Clarion Island, Revillagigedo Islands H. L. Mason 1555 1925-4-26
GH: 00006815 Erigeron crenatus Eastwood Mexico: Colima San Benedicto Island, Revillagigedo Islands H. L. Mason 1683 1925-5-11
GH: 00427109 Eriophyllum lanatum (Pursh) C. N. Forbes USA: California Bartlet Mountain Road H. L. Mason 2567 1925-12-31
GH: 00007313 Eupatorium pacificum B. L. Robinson Mexico: Colima Socorro Island, Revillagigedo Islands. H. L. Mason 1666 1925-5-8
GH: 00257518 Perityle emoryi Torrey Mexico: Baja California Norte Guadalpe Island H. L. Mason 1502 1925-4-19
GH: 00257518 Perityle grayi Rose Mexico: Baja California Norte Guadalpe Island H. L. Mason 1502 1925-4-19
GH: 00427714 Senecio flaccidus monoensis (Greene) B. L. Turner & T. M. Barkley USA: California Box S. Springs H. L. Mason 3088 1925-4-25
Aytoniaceae FH: 00495165 Asterella bolanderi (Austin) Underwood USA: California [data not captured] H. L. Mason 2531 1925-12-20
FH: 00497687 Fimbraria bolanderi Austin USA: California [data not captured] H. L. Mason 2531 1925-12-20
FH: 00497705 Fimbraria californica Hampe & Austin USA: California [data not captured] H. L. Mason 2545 1925-12-30
FH: 00497706 Fimbraria californica Hampe & Austin USA: California [data not captured] H. L. Mason 2258 1925-10-25
Brassicaceae GH: 00378696 Arabis blepharophylla Hooker & Arnott USA: California San Francisco: Bernal heights H. L. Mason 1271 1925-3-1
GH: 00378968 Cardamine californica integrifolia (Nuttall) Rollins USA: California Hills north of San Rafael H. L. Mason 1180 1925-1-18
Bromeliaceae GH: 01817492 Tillandsia eistetteri Ehlers Mexico: Nayarit Tres Marias Islands, arroya Hondo H. L. Mason 1723 1925-5-17
GH: 01817753 Tillandsia intermedia Mez Mexico: Nayarit Tres Marias Islands, Maria Madre, Arroyo Hon... H. L. Mason 1765 1925-5-18
Burseraceae GH: 00044397 Bursera nesopola I. M. Johnston Mexico: Colima Revillagigedo Islands, Benner's Cove, Socorr... H. L. Mason 1609 1925-5-3
Calypogeiaceae FH: 00496055 Calypogeia trichomanis (Linnaeus) Corda USA: California [data not captured] H. L. Mason 2255 1925-10-25
Campanulaceae GH: 01795748 Campanula prenanthoides Durand USA: California Big Oak Flat Road to Tuolumne Grove H. L. Mason 2218 1925-8-11
Cephaloziellaceae FH: 00496678 Cephaloziella divaricata (Smith) Warnstorf USA: California [data not captured] H. L. Mason 2509 1925-11-26
FH: 00496692 Cephaloziella divaricata (Smith) Warnstorf USA: California [data not captured] H. L. Mason 2532 1925-12-20
FH: 00496693 Cephaloziella divaricata (Smith) Warnstorf USA: California [data not captured] H. L. Mason 2509 1925-11-26
FH: 00496695 Cephaloziella divaricata (Smith) Warnstorf USA: California [data not captured] H. L. Mason 2547 1925-12-30
FH: 00496772 Cephaloziella turneri (Hooker) Müller Freib. USA: California [data not captured] H. L. Mason 2513 1925-11-26
FH: 00496775 Cephaloziella turneri (Hooker) Müller Freib. USA: California [data not captured] H. L. Mason 2528 1925-12-20
FH: 00496778 Cephaloziella turneri (Hooker) Müller Freib. USA: California [data not captured] H. L. Mason 2528 1925-12-20
Conocephalaceae FH: 00497395 Conocephalum conicum (Linnaeus) Underwood USA: California [data not captured] H. L. Mason 2245 1925-10-25
Convolvulaceae GH: 00054502 Ipomoea halierca I. M. Johnston Mexico: Colima Revillagigedo Islands, Clarion Island, above... H. L. Mason 1553 1925-4-26
Crassulaceae GH: 01987512 Dudleya acuminata Rose Mexico: Baja California Norte San Quintin Bay H. L. Mason 2057 1925-6-7
GH: 01987513 Dudleya albiflora Rose Mexico: Magdalena Bay, Lower California H. L. Mason 1898 1925-5-29
GH: 01987515 Dudleya anthonyi Rose Mexico: San Martin Island H. L. Mason 2068 1925-6-8
GH: 01987526 Dudleya cultrata Rose Mexico: San Martin Island H. L. Mason 2076 1925
Ericaceae GH: 00350365 Arctostaphylos glandulosa cushingiana (Eastwood) J. E. Adams ex McMinn USA: California Mount Tamalpais H. L. Mason 1220 1925-2-1
GH: 00362167 Arctostaphylos sensitiva Jepson USA: California Mount Tamalpais H. L. Mason 1219 1925-2-1
GH: 01117723 Arctostaphylos stanfordiana Parry USA: California Wooden Valley Grade H. L. Mason 1202 1925-1-22
GH: 00362892 Pyrola asarifolia bracteata (Hooker) Haber USA: California Mount Elwell H. L. Mason 2891 1925-7
GH: 00363251 Vaccinium parvifolium Smith USA: California Woodwardia Creek, Big Basin H. L. Mason 2244 1925-10-25
Euphorbiaceae A: 00047115 Croton masonii I. M. Johnston Mexico: Colima East slope of Socorro Island, Revillagigedo ... H. L. Mason 1637 1925-5-5
GH: 00047116 Croton masonii I. M. Johnston Mexico: Colima East slope of Socorro Island, Revillagigedo ... H. L. Mason 1637 1925-5-5
A: 00047115 Croton sp. Mexico: Colima East slope of Socorro Island, Revillagigedo ... H. L. Mason 1637 1925-5-5
GH: 00047116 Croton sp. Mexico: Colima East slope of Socorro Island, Revillagigedo ... H. L. Mason 1637 1925-5-5
GH: 00347531 Euphorbia misera Bentham USA: California San Diego: Hills near U.S. Navy fuel dock H. L. Mason 1496 1925-4-18
Fabaceae GH: 02342298 Trifolium breweri S. Watson USA: California [data not captured] H. L. Mason 2216 1925-8-11
GH: 02342561 Trifolium ciliolatum Bentham USA: California [data not captured] H. L. Mason 2153 1925-7-10
Frullaniaceae FH: 00498056 Frullania bolanderi Austin USA: California [data not captured] H. L. Mason 2487 1925-11-15
FH: 00498077 Frullania bolanderi Austin USA: California [data not captured] H. L. Mason 2518 1925-11-26
FH: 00498079 Frullania bolanderi Austin USA: California [data not captured] H. L. Mason 1925-1-11
FH: 00498083 Frullania bolanderi Austin USA: California [data not captured] H. L. Mason 2518 1925-11-26
FH: 00498084 Frullania bolanderi Austin USA: California [data not captured] H. L. Mason 2518 1925-11-26
FH: 00498126 Frullania californica (Austin ex Underwood) A. W. Evans USA: California [data not captured] H. L. Mason 2510 1925-11-26
FH: 00498127 Frullania californica (Austin ex Underwood) A. W. Evans USA: California [data not captured] H. L. Mason 2510 1925-11-26
FH: 00498129 Frullania californica (Austin ex Underwood) A. W. Evans USA: California [data not captured] H. L. Mason 2510 1925-11-26
FH: 00498132 Frullania californica (Austin ex Underwood) A. W. Evans USA: California [data not captured] H. L. Mason 2510 1925-11-26
FH: 00498135 Frullania californica (Austin ex Underwood) A. W. Evans USA: California [data not captured] H. L. Mason 2488 1925-11-15
FH: 00498136 Frullania californica (Austin ex Underwood) A. W. Evans USA: California [data not captured] H. L. Mason 2510 1925-11-26
FH: 00498141 Frullania californica (Austin ex Underwood) A. W. Evans USA: California [data not captured] H. L. Mason 2510 1925-11-26
Geocalycaceae FH: 00500438 Lophocolea heterophylla (Schrader) Dumortier USA: California [data not captured] H. L. Mason 2525 1925-12-20
FH: 00500439 Lophocolea heterophylla (Schrader) Dumortier USA: California [data not captured] H. L. Mason 2508 1925-11-26
FH: 00500440 Lophocolea heterophylla (Schrader) Dumortier USA: California [data not captured] H. L. Mason 2525 1925-12-20
FH: 00500444 Lophocolea heterophylla (Schrader) Dumortier USA: California [data not captured] H. L. Mason 2525 1925-12-20
Hippocastanaceae GH: 00381781 Aesculus californica (Spach) Nuttall USA: California Tuolumne Canyon near Mather H. L. Mason 2129 1925-6-27
Hydrophyllaceae GH: 00402740 Eriodictyon californicum (Hooker & Arnott) Torrey USA: California Hog Ranch, Mather H. L. Mason 2124 1925-6-27
Hypericaceae GH: 00067624 Hypericum eastwoodianum I. M. Johnston Mexico: Socorro Island, sheltered places on face of ... H. L. Mason 1614 1925-5-4
Jungermanniaceae FH: 00508748 Plectocolea crenulata (Mitten) A. Evans USA: California [data not captured] H. L. Mason 2529 1925-12-20
FH: 00508749 Plectocolea crenulata (Mitten) A. Evans USA: California [data not captured] H. L. Mason 2515 1925-11-26
Lamiaceae GH: 00400411 Mentha arvensis Linnaeus USA: California Mather H. L. Mason 2146 1925-7-4
GH: 00002166 Teucrium affine dentosum I. M. Johnston Mexico: Colima San Benedicto Island: H. L. Mason 1685 1925-5-11
GH: 00402483 Trichostema oblongum Bentham USA: California Hog Ranch, Mather H. L. Mason 2178 1925-7-27
Lauraceae GH: 00381292 Umbellularia californica (Hooker & Arnott) Nuttall USA: California Hopland, Cloverdale Grade H. L. Mason 2558 1925-12-30
Malvaceae GH: 00058043 Sida nesogena I. M. Johnston Mexico: Colima Socorro Island: Grayson's Cove H. L. Mason 1613 1925-5-4
Myrtaceae GH: 00071233 Psidium socorrense I. M. Johnston Mexico: East slope of Socorro Island H. L. Mason 1639 1925-5-5
Oleaceae GH: 00401190 Fraxinus latifolia Bentham USA: California Ross Valley to Lake Lagunitas H. L. Mason 2225 1925-9-17
GH: 00401190 Fraxinus oregona Nuttall USA: California Ross Valley to Lake Lagunitas H. L. Mason 2225 1925-9-17
Onagraceae GH: 01624404 Boisduvalia densiflora (Lindley) S. Watson USA: California Hog Ranch H. L. Mason 2163 1925-7-16
Orchidaceae AMES: 02051000 Listera convallarioides (Swartz) Nuttall ex Elliott USA: California along Smith Peak Trail northeast of Mather H. L. Mason 2190 1925-7-30
AMES: 00074824 Pleurothallis unguicallosa Ames & C. Schweinfurth Mexico: Socorro Island (Revillagigedo island); east ... H. L. Mason 1628 1925-5-5
AMES: 00083490 Pleurothallis unguicallosa Ames & C. Schweinfurth Mexico: Socorro Island (Revillagigedo island); east ... H. L. Mason 1628 1925-5-5
Piperaceae GH: 00005019 Peperomia socorronis Trelease ex I. M. Johnston Mexico: Socorro Island, near Mt. Evermann summit. H. L. Mason 1653 1925-5-8
GH: 01982766 Peperomia tetraphylla (G. Forster) Hooker & Arnott Mexico: Colima Socorro Island: East slope of island H. L. Mason 1629 1925-5-5
Plantaginaceae GH: 01999435 Gratiola ebracteata Bentham ex A. de Candolle USA: California [data not captured] H. L. Mason 2230 1925-9-17
GH: 02002781 Penstemon breviflorus Lindley USA: California [data not captured] H. L. Mason 2105 1925-6-24
Poaceae GH: 00024195 Paspalum longum Chase ex I. M. Johnston Mexico: Colima Revillagigedo Islands, Socorro Island, Benne... H. L. Mason 1648 1925-5-7
Polygonaceae GH: 00036146 Coccoloba barbadensis Jacquin Mexico: Nayarit Maria Magdalena, Tres Marias Islands, Revill... H. L. Mason 1806 1925-5-21
A: 00061916 Coccoloba barbadensis Jacquin Mexico: Nayarit Maria Magdalena, Tres Marias Islands, Revill... H. L. Mason 1806 1925-5-21
GH: 00036146 Coccoloba masonii Lundell Mexico: Nayarit Maria Magdalena, Tres Marias Islands, Revill... H. L. Mason 1806 1925-5-21
A: 00061916 Coccoloba masonii Lundell Mexico: Nayarit Maria Magdalena, Tres Marias Islands, Revill... H. L. Mason 1806 1925-5-21
GH: 01966368 Eriogonum roseum Durand & Hilgard USA: California [data not captured] H. L. Mason 1925-7-29
Porellaceae FH: 00506040 Madotheca navicularis (Lehmann & Lindenberg) Nees USA: California [data not captured] H. L. Mason 2517 1925-11-26
FH: 00506328 Madotheca rivularis Nees USA: California [data not captured] H. L. Mason 1925-2
FH: 00506329 Madotheca rivularis Nees USA: California [data not captured] H. L. Mason 2523 1925-11-26
FH: 00506295 Madotheca roellii (Stephani) Stephani USA: California [data not captured] H. L. Mason 2519 1925-11-26
FH: 00506297 Madotheca roellii (Stephani) Stephani USA: California [data not captured] H. L. Mason 2519 1925-11-20
FH: 00506301 Madotheca roellii (Stephani) Stephani USA: California [data not captured] H. L. Mason 2519 1925-11-26
Portulacaceae GH: 01858603 Claytonia exigua Torrey & A. Gray USA: California junction 1.2 mile southwest of Sunol H. L. Mason 1281 1925-3-7
Pteridaceae GH: 00518244 Cheilanthes microphylla Swartz Mexico: Colima Revillagigedo Islands, Socorro Island, above... H. L. Mason 1616 1925-5-4
GH: 00518244 Cheilanthes peninsularis insularis Weatherby Mexico: Colima Revillagigedo Islands, Socorro Island, above... H. L. Mason 1616 1925-5-4
Pucciniaceae FH: 00940889 Puccinia aristidae Tracy USA: California San Diego: [no additional data] H. L. Mason 1925-5
FH: 00941437 Uromyces intricatus Cooke USA: California Mather H. L. Mason 1925
Radulaceae FH: 00509591 Radula bolanderi Gottsche ex Stephani USA: California [data not captured] H. L. Mason 2501 1925-11-26
Rhamnaceae GH: 00367969 Ceanothus cordulatus Kellogg USA: California Big Oak Flat Road near Tuolumne Grove. H. L. Mason 2211 1925-8-11
Ricciaceae FH: 00510117 Riccia campbelliana M. Howe USA: California [data not captured] H. L. Mason 1925-1
Roccellaceae FH: 00394172 Dendrographa leucophaea (Tuckerman) Darbishire USA: California [data not captured] H. L. Mason 1925-4
Rosaceae GH: 01586423 Acaena trifida Ruiz & Pavon USA: California San Francisco: Bernal Heights H. L. Mason 1266 1925-3-1
GH: 00346189 Rubus leucodermis Douglas ex Torrey & A. Gray USA: California Hog Ranch, Mather H. L. Mason 2171 1925-7-16
Rutaceae GH: 00347911 Cneoridium dumosum (Nuttall ex Torrey & A. Gray) Hooker f. USA: California San Diego: Hills back of Navy Fuel Dock H. L. Mason 1497 1925-4-18
Sabiaceae GH: 00051027 Meliosma socorrensis I. M. Johnston Mexico: Colima Revillagigedo Islands: east slope of Socorro... H. L. Mason 1627 1925-5-5
A: 00051028 Meliosma socorrensis I. M. Johnston Mexico: Colima Revillagigedo Islands: east slope of Socorro... H. L. Mason 1627 1925-5-5
Saxifragaceae GH: 00380641 Ribes nevadense Kellogg USA: California Hog Ranch, Mather H. L. Mason 2173 1925-7-16
GH: 00380739 Ribes roezlii Regel USA: California Mather H. L. Mason 2158 1925-7-15
GH: 00381134 Saxifraga californica Greene USA: California Sunol H. L. Mason 1284 1925-3-7
GH: 00381229 Tiarella unifoliata Hooker USA: California Big Basin H. L. Mason 2243a 1925-10-25
Scapaniaceae FH: 00510674 Scapania bolanderi Austin USA: California [data not captured] H. L. Mason 1925-10-25
Solanaceae A: 00813456 Lycium richii A. Gray Mexico: Baja California Sur Magdalena Bay H. L. Mason 1925-5-29
GH: 00813438 Lycium richii A. Gray Mexico: Baja California Norte Cedros Island: [no additional data] H. L. Mason 2014 1925-6-4
GH: 00815167 Nicotiana clevelandii A. Gray Mexico: Baja California Norte San Martin Island H. L. Mason 2069 1925
GH: 00077240 Nicotiana nesophila I. M. Johnston Mexico: Revillagigedo Islands, Socorro Island, H. L. Mason 1596 1925-5-3
GH: 00815279 Nicotiana obtusifolia Mertens & Galeotti Mexico: Nayarit Tress Marias Islands; Maria Madre H. L. Mason I694 1925-5-16
GH: 00815386 Nicotiana stocktoni Brandegee Mexico: Colima Clarion Island: Sulphur Bay H. L. Mason 1585 1925-8-29
Targioniaceae FH: 00511517 Targionia hypophylla Linnaeus USA: California [data not captured] H. L. Mason 2530 1925-12-20
