Collection Holdings from Southwestern U.S.A.:
Includes:
Apocynaceae
Subfamily Asclepiadoideae
Tribe Asclepiadeae
- Asclepias tuberosa
- SE. Canada, U.S.A. to N. Mexico
Araceae
Subfamily Lemnoideae
- Lemna minor
- Cosmopolitan
- Wolffia columbiana
- N & S America
Araliaceae
Subfamily Hydrocotyloideae
- Hydrocotyle verticillata
- cosmopolitan
Aristolochiaceae
Subfamily Aristolchioideae
Tribe Aristolochieae
- Aristolochia californica
- northern California USA (endemic)
Asparagaceae
Subfamily Agavoideae
Tribe Agaveae
- Agave americana
- eastern Mexico
- Agave americana 'Marginata'
- western Mexico
- Agave murpheyi
- Arizona, Sonora Mexico
- Agave parryi
- SE. Arizona to Texas and N. & W. Mexico
Subfamily Scilloideae
Tribe Hyacintheae
- Camassia quamash
- western USA and Canada
Asteraceae
Subfamily Asteroideae
Tribe Anthemideae
- Artemisia tridentata
- intermountain west USA
- Artemisia tridentata subsp. vaseyana
- western US
Bignoniaceae
Subfamily
Tribe Tecomeae
- Tecoma stans
- tropical America
Bromeliaceae
Subfamily Tillandsioideae
- Tillandsia recurvata
- Trop. & Subtrop. America
Burseraceae
- Bursera fagaroides
- Mexico
- Bursera microphylla
- Arizona, Cal. NW Mexico
Cactaceae
Subfamily Cactoideae
Tribe Cacteae
- Ferocactus cylindraceus
- southwestern USA, northern Mexico
W/C
Subfamily Cactoideae
Tribe Phyllocacteae
- Carnegiea gigantea
- southwestern USA, northern Mexico
W/C
- Carnegiea gigantea
- Southern Arizona, southeast California and northwest Mexico
- Lophocereus schottii
- Baja California
Subfamily Opuntioideae
Tribe Opuntieae
- Opuntia fragilis
- western US - wide distribution, but not common
Ceratophyllaceae
- Ceratophyllum demersum
- cosmopolitan, native to all continents except Antarctica.
Convolvulaceae
Subfamily Convolvuloideae
Tribe Convolvuleae
- Calystegia sepium
- Europe, Asia, North America
Cornaceae
- Cornus sericea
- Canada, USA, Mexico
Crassulaceae
Subfamily Sempervivoideae
Tribe Sedeae
- Dudleya brevifolia
- USA: San Diego area, California
W/C
- Dudleya pulverulenta
- USA: MRO283, Vista, Ca
W/C
Cucurbitaceae
Subfamily
Tribe Sicyoeae
- Marah macrocarpus
- southern California, USA
W/C
Cupressaceae
Subfamily Sequoioideae
- Sequoia sempervirens
- Southwestern N. America - Oregon to California.
Cystopteridaceae
- Cystopteris bulbifera
- eastern North America
Dryopteridaceae
- Polystichum munitum
- western USA, Canada
W/C
Equisetaceae
- Equisetum hyemale
- eastern North America
- Equisetum laevigatum
- Wasatch Mtns, Utah, USA
Fabaceae
Subfamily Faboideae
Tribe Amorpheae
- Amorpha fruticosa
- originally from se USA, now widespread across North America
Subfamily Mimosoideae
Tribe Acacieae
- Acacia angustissima
-
- Vachellia farnesiana
- widely naturalized, but probably native to S. USA and Mexico
Fagaceae
Subfamily Quercoideae
- Quercus gambelii
- WC. & SC. U.S.A. to N. Mexico
Grossulariaceae
- Ribes cereum
- western North America
Hydrocharitaceae
- Elodea canadensis
- S. Canada to U.S.A.
- Vallisneria americana
- N. America to Honduras, Colombia, Caribbean
Juncaginaceae
- Triglochin maritima
- Temp. Northern Hemisphere, S. South America
W/C
Lamiaceae
Subfamily Nepetoideae
Tribe Mentheae
- Salvia microphylla
- Arizona to Guatemala
Subfamily Scutellarioideae
- Scutellaria tuberosa
- USA and Mexico, Pacific Coast
W/C
Lauraceae
- Umbellularia californica
- Oregon & California
Lentibulariaceae
- Utricularia vulgaris subsp. macrorhiza
- Siberia to Russian Far East and N. China, N. Japan, N. America
W/C
Martyniaceae
- Proboscidea parviflora
- southwestern USA, northern Mexico
Nyctaginaceae
- Mirabilis laevis
- western USA
W/C
Phytolaccaceae
- Rivina humilis
- S. US & trop America
Pinaceae
Subfamily Pinoideae
- Pinus engelmannii
- SE. Arizona to SW. New Mexico and N. Mexico
- Pinus ponderosa
- SW. Canada to N. Mexico
Poaceae
Subfamily Panicoideae
Tribe Andropogoneae
- Schizachyrium scoparium
- Canada to Mexico
Polemoniaceae
Subfamily Polemonioideae
Tribe Polemonieae
- Polemonium viscosum
- western North America
Pteridaceae
Subfamily Cheilanthoideae
- Aspidotis densa
- western USA and Canada
- Cheilanthes eatonii
- USA and Mexico
Rosaceae
Subfamily Amygdaloideae
Tribe Maleae
- Heteromeles arbutifolia
- Oregon & California, USA
W/C
Subfamily Dryadoideae
Tribe Dryadeae
- Cercocarpus montanus
- western US
- Purshia tridentata
- western US & Canada
Subfamily Rosoideae
Tribe Potentilleae
- Fragaria chiloensis
- western North America & disjunct population in Chile
W/C
Rubiaceae
Subfamily Cinchonoideae
Tribe Cephalantheae
- Cephalanthus occidentalis Sugar Shack
- E. Canada to C. America, Cuba
Santalaceae
- Phoradendron leucarpum
- southern US & Mexico
W/C
Sarraceniaceae
- Sarracenia purpurea
- Eastern N. America
Saururaceae
- Anemopsis californica
- W. & C. U.S.A. to Mexico
W/C
Selaginellaceae
- Selaginella watsonii
- western USA
Simmondsiaceae
- Simmondsia chinensis
- southwestern North America
Talinaceae
- Talinum paniculatum
- southern US toSouth America
Urticaceae
Subfamily
Tribe Urticeae
- Urtica dioica
- widely naturalized in temperate climates
Verbenaceae
Subfamily
Tribe Lantaneae
- Aloysia gratissima
- Arizona to Texas, Mexico, Brazil to N. Argentina
W/C
Zygophyllaceae
Subfamily Larreoideae
- Larrea tridentata
- southwestern USA and Mexico
W/C = Wild Collected
= Currently Flowering
= Image(s) Available = map available for this accession
data regenerated on Sat, 26 Jul 2025 02:09:09 -0400