~ most recently updated 27 May 2007, Kathryn Mauz, University of Arizona Herbarium ~
Key to symbols and related links are at the bottom of the list.
.
 

There are now 230 plant species, including 186 native species,
on this list!
     

 Plant Family

 Plant Name
     

Growth Form
Acanthaceae Anisacanthus thurberi (Torr.) A. Gray W P

shrub
  Carlowrightia arizonica A. Gray   W P

herb
Dicliptera resupinata (Vahl) Juss. W P

herb
  Justicia longii Hilsenb.   W P

herb
Ruellia nudiflora (Engelm. & A. Gray) Urb. W P

herb
Aizoaceae Trianthema portulacastrum L. W A

herb
Amaranthaceae Amaranthus obcordatus (A. Gray) Standl. W A

herb
Amaranthus palmeri S. Watson W A

herb
Tidestromia lanuginosa (Nutt.) Standl. W A

herb
Anacardiaceae Rhus lancea L. * C P

tree
Apiaceae Bowlesia incana Ruiz & Pav. C A

herb
Daucus pusillus Michx. C A

herb
  Spermolepis echinata (Nutt.) A. Heller   C A

herb
Aristolochiaceae Aristolochia watsonii Wooton & Standl. W P

vine
Asclepiadaceae Sarcostemma cynanchoides Decne. subsp. cynanchoides W P

vine
Asteraceae Ambrosia confertiflora DC. W P

herb
Ambrosia cordifolia (A. Gray) W.W. Payne C P

subshrub
Ambrosia deltoidea (Torr.) W.W. Payne C P

subshrub
Baccharis sarothroides A. Gray W P

shrub
  Bahia absinthifolia Benth.   W P

herb
Baileya multiradiata Harv. & A. Gray U P

herb
Brickellia coulteri A. Gray U P

subshrub
Centaurea melitensis L. * C A

herb
  Chaenactis stevioides Hook. & Arn.   C A

herb
Conyza bonariensis (L.) Cronquist * W A

herb
Conyza canadensis (L.) Cronquist W A

herb
Conyza coulteri A. Gray W A

herb
  Dimorphotheca sinuata DC. * C A

herb
Erigeron divergens Torr. & A. Gray C A

herb
  Evax multicaulis DC.   C A

herb
Gutierrezia microcephala (DC.) A. Gray W P

subshrub
Hymenothrix wislizeni A. Gray W A

herb
Isocoma tenuisecta Greene W P

subshrub
Iva ambrosiaefolia A. Gray W A

herb
Lactuca seriola L. * C A

herb
Machaeranthera coulteri (A. Gray) B.L. Turner & D.B. Horne
.....var. arida (B.L. Turner & D.B. Horne) B.L. Turner
U P

herb
Machaeranthera tagetina Greene W P

herb
  Pectis cylindrica (Fernald) Rydb.   W A

herb
  Pectis papposa Harv. & A. Gray   W A

herb
Porophyllum gracile Benth. U P

herb
Psilostrophe cooperi (A. Gray) Greene W P

herb
  Rafinesquia neomexicana A. Gray   C A

herb
  Senecio flaccidus Less.
.....var. monoensis (Greene) B.L. Turner & T.M. Barkley
  C A

herb
Sonchus oleraceus L. * C A

herb
Stephanomeria pauciflora A. Gray W P

herb
Verbesina encelioides (Cav.) A. Gray W A

herb
Xanthium strumarium L. W A

herb
Boraginaceae Amsinckia intermedia Fisch. & C.A. Mey.   C A

herb
  Amsinckia tessellata A. Gray   C A

herb
  Cryptantha angustifolia (Torr.) Greene   C A

herb
  Cryptantha barbigera (A. Gray) Greene   C A

herb
  Cryptantha pterocarya (Torr.) Greene.var. cycloptera (Greene) J.F. Macbr.   C A

herb
  Harpagonella palmeri A. Gray   C A

herb
Lappula occidentalis (S. Watson) Greene C A

herb
  Pectocarya recurvata I.M. Johnst.   C A

herb
Brassicaceae Brassica tournefortii Gouan * C A

herb
Caulanthus lasiophyllus (Hook. & Arn.) Payson C A

herb
Descurainia pinnata (Walter) Britton C A

herb
  Draba cuneifolia Nutt.   C A

herb
  Lepidium densiflorum Schrad.   C A

herb
Lepidium lasiocarpum Nutt. ex Torr. & A. Gray C A

herb
  Lepidium oblongum Small   C A

herb
Lesquerella gordonii (A. Gray) S. Watson C A

herb
Matthiola longipetala (Vent.) DC. * C A

herb
Sisymbrium irio L. * C A

herb
  Streptanthus carinatus C. Wright ex A. Gray
.....subsp. arizonicus (S. Watson) Kruckeb., Rodman & Worth.
  C A

herb
Cactaceae Cylindropuntia arbuscula Engelm. C P

succulent
Cylindropuntia spinosior (Engelm.) Toumey C P

succulent
Cylindrountia leptocaulis DC. W P

succulent
Opuntia ficus-indica (L.) Mill. * C P

succulent
Opuntia microdasys (Lehm.) Pfeifl * C P

succulent
Opuntia phaeacantha Engelm. C P

succulent
Capparaceae Polanisia trachysperma Torr. & A. Gray W A

herb
Caryophyllaceae Silene antirrhina L. C A

herb
Celtidaceae Celtis pallida Torr.   U P

shrub
Chenopodiaceae Atriplex canescens (Pursh) Nutt. W P

shrub
Atriplex elegans (Moq.) D. Dietr. subsp. elegans U A

herb
Atriplex linearis S. Watson W P

sub/shrub
Atriplex polycarpa (Torr.) S. Watson W P

shrub
Atriplex wrightii S. Watson W A

herb
Chenopodium neomexicanum Standl. W A

herb
  Monolepis nuttalliana (Schult.) Greene   C A

herb
Salsola tragus L. * W A

herb
Suaeda Torr.ana S. Watson W P

subshrub
Convolvulaceae Cuscuta odontolepis Engelm.   W A

parasite
Cuscuta umbellata H.B.K. W A

parasite
  Evolvulus alsinoides L.   U P

herb
Ipomoea hederacea Jacq. W A

vine
  Ipomoea ×leucantha Jacq. W A

vine
Cucurbitaceae Cucurbita digitata A. Gray W P

vine
Cucurbita pepo L. [acorn squash] * W A

vine
Cyperaceae Cyperus esculentus L.   W A

herb
  Cyperus squarrosus L.   W A

herb
Euphorbiaceae Ditaxis neomexicana Müll.Arg.   W A

herb
Euphorbia abramsiana L.C. Wheeler W A

herb
Euphorbia capitellata Engelm. W P

herb
  Euphorbia florida Engelm.   W A

herb
Euphorbia heterophylla L. W A

herb
Euphorbia hyssopifolia L. W A

herb
Euphorbia pediculifera Engelm. U P

herb
  Euphorbia setiloba Engelm.   W A

herb
Fabaceae Acacia greggii A. Gray C P

shrub/tree
  Astragalus allochrous A. Gray   C A

herb
  Hoffmanseggia glauca (Ortega) Eifert   U P

herb
  Marina parryi (A. Gray) Barneby   U A

herb
  Medicago hispida Gaertn. * C A

herb
Medicago sativa L. * W P

herb
Melilotus indicus (L.) All. * C A

herb
Parkinsonia aculeata L. C P

tree
Parkinsonia florida (Benth. ex A. Gray) S. Watson C P

tree
Prosopis glandulosa Torr. var. glandulosa C P

tree
Prosopis velutina Wooton C P

tree
  Senna covesii (A. Gray) Irwin & Barneby   W P

herb
Fumariaceae Fumaria parviflora Lam.

*
C A

herb
Geraniaceae Erodium cicutarium (L.) L'Hér.

*
C A

herb
Hydrophyllaceae Eucrypta micrantha (Torr.) A. Heller   C A

herb
Phacelia ambigua M.E. Jones C A

herb
Phacelia distans Benth. C A

herb
Koeberliniaceae Koeberlinia spinosa Zucc. W P

shrub
Lamiaceae Lamium amplexicaule L. * C A

herb
Salvia columbariae Benth. C A

herb
Loasaceae Mentzelia affinis Greene   C A

herb
Malvaceae Abutilon incanum (Link) Sweet W P

herb
  Anoda pentaschista A. Gray   W P

herb
  Herissantia crispa (L.) Brizicky   W P

herb
Malva parviflora L. * U A

herb
Rhyncosida physocalyx (A. Gray) Fryxell W P

herb
  Sphaeralcea ambigua A. Gray var. ambigua   U P

herb
Sphaeralcea laxa Wooton & Standl. W P

herb
Martyniaceae Proboscidea parviflora (Wooton) Wooton & Standl. W A

herb
Moraceae Morus alba L. * C P

tree
Nyctaginaceae Allionia incarnata L. U P

herb
Boerhavia coccinea Mill. W P

herb
Boerhavia erecta L. W A

herb
  Boerhavia pterocarpa S. Watson   W A

herb
Boerhavia watsoni Standl. W A

herb
  Boerhavia wrightii A. Gray   W A

herb
Commicarpus scandens (L.) Standl. W P

herb
Onagraceae Camissonia californica (Nutt. ex Torr. & A. Gray) P.H. Raven C A

herb
Camissonia chamaenerioides A. Gray C A

herb
Gaura parviflora Douglas ex Lehm. C A

herb
Papaveraceae Corydalis aurea Willd. subsp. occidentalis (Engelm.) G.B. Ownbey   C A

herb
  Eschscholzia californica Cham. subsp. mexicana (Greene) C. Clark   C A

herb
Plantaginaceae Plantago ovata Forssk. C A

herb
Plantago patagonica Jacq. C A

herb
  Plantago rhodosperma Decne.   C A

herb
Poaceae Aristida purpurea Nutt. var. longiseta Vasey W P

herb
Aristida purpurea Nutt. var. nealleyi (Vasey) Allred W P

herb
Aristida ternipes Cav. var. gentilis (Henr.) Allred W P

herb
Aristida ternipes Cav. var. ternipes W P

herb
Arundo donax L. * W P

shrub
Avena fatua L. * C A

herb
Bouteloua aristidoides (H.B.K.) Griseb. W A

herb
  Bouteloua barbata Lag.   W A

herb
  Bouteloua repens Scribn. & Merr.   W A

herb
Bouteloua rothrockii Vasey W A

herb
Brachiaria arizonica (Scribn. & Merr.) S.T. Blake W A

herb
Brachiaria fasciculata (Sw.) Parodi W A

herb
Bromus carinatus Hook. & Arn. C A

herb
Bromus catharticus Vahl * C A

herb
Bromus rubens L. * C A

herb
Chloris crinita (Lag.) Parodi W P

herb
  Chloris virgata Sw.   W A

herb
Cynodon dactylon L. * W P

herb
Dactyloctenium aegyptium (L.) Willd. * W A

herb
Digitaria californica (Benth.) Henr. W P

herb
Echinochloa colonum (L.) Link * W A

herb
Eragrostis cilianensis (All.) Vignolo ex Janch. * W A

herb
Eragrostis lehmanniana Nees * W P

herb
Eriochloa acuminata (J. Presl) Kunth var. acuminata W A

herb
Eriochloa aristata Vasey W A

herb
  Erioneuron pulchellum (Kunth) Tateoka   U P

herb
Heteropogon contortus (L.) Roem. ex Schult. W P

herb
Hordeum murinum L.subsp. glaucum (Steud.) Tzvelev * C A

herb
  Hordeum pusillum Nutt.   C A

herb
Hordeum vulgare L. * C A

herb
Leptochloa fusca (L.) H.B.K. subsp. uninervia (Presl) N. Snow W A

herb
  Leptochloa mucronata (Michx.) Kunth   W A

herb
Leptochloa viscida (Scribn.) Beal W A

herb
Melinis repens (Willd.) Zizka subsp. repens * W A

herb
Panicum antidotale Retz. * W A

herb
  Panicum hirticaule J. Presl   W A

herb
  Panicum obtusum H.B.K.   W P

herb
Panicum stramineum Hitchc. & Chase W A

herb
Pappophorum vaginatum Buckley W A

herb
Pennisetum ciliare (L.) Link * W P

herb
Phalaris minor Retz. * C A

herb
Poa bigelovii Vasey C A

herb
  Schismus arabicus Nees * C A

herb
Setaria macrostachya H.B.K.. W P

herb
  Sorghum bicolor (L.) Moench * W A

herb
Sorghum halepense (L.) Pers. * W P

herb
Sporobolus airoides (Torr.) Torr. W P

herb
Sporobolus cryptandrus (Torr.) A. Gray W P

herb
  Trisetum interruptum Buckley   C A

herb
Vulpia octoflora (Walter) Rydb. var. hirtella (Piper) Henr. C A

herb
Polemoniaceae Eriastrum eremicum (Jeps.) H. Mason C A

herb
  Gilia stellata A. Heller   C A

herb
Polygonaceae Eriogonum abertianum Torr. U A

herb
Eriogonum deflexum Torr. W P

herb
Polygonum argyrocoleon Steud. ex Kunze * W P

herb
  Polygonum aviculare L.   C A

herb
Rumex crispus L. * C A

herb
Portulacaceae Portulaca oleracea L. * W A

herb
  Portulaca retusa Engelm.   W A

herb
Primulaceae Androsace occidentalis Pursh   C A

herb
Resedaceae Oligomeris linifolia (Vahl) J.F. Macbr. C A

herb
Rhamnaceae Zizyphus obtusifolia (Hook. ex Torr. & A. Gray) A. Gray W P

shrub
Rubiaceae Gallium proliferum A. Gray   C A

herb
Scrophulariaceae Maurandya antirrhiniflora Humb. & Bonpl. W P

vine
Penstemon parryi A. Gray C P

herb
Veronica peregrina L. C A

herb
Simmondsiaceae Simmondsia chinensis (Link) C.K. Schneid. C P

shrub
Solanaceae Datura discolor Bernhardi   W A

herb
Lycium andersonii A. Gray W P

shrub
Lycium fremontii A. Gray C P

shrub
Nicotiana obtusifolia M. Martens & Galeotti U P

herb
Physalis acutifolia (Miers) Sandwith W A

herb
  Quincula lobata (Torr.) Raf.   W P

herb
Solanum elaeagnifolium Cav. W P

herb
Sterculiaceae Ayenia filiformis S. Watson   U P

subshrub
Tamaricaceae Tamarix aphylla (L.) Karst. * U P

tree
Urticaceae Parietaria hespera B.D. Hinton   C A

herb
Viscaceae Phoradendron californicum Nutt. C P

parasite
Zygophyllaceae Kallstroemia californica (S. Watson) Vail W A

herb
  Kallstroemia grandiflora Torr. ex A. Gray   W A

herb
Larrea divaricata Cav. subsp. tridentata (DC.) Felger & Lowe U P

shrub
Tribulus terrestris L. * W A

herb
           

Key to symbols:

* - non-native species
Phenology: W - warm season, C - cool season, U - non-seasonal
Longevity: A - annual, P - perennial or biennial

Links:

Order a backissue of the journal, Desert Plants, which published an earlier version of this flora and an historic comparison with a 1909 flora of the Santa Cruz Valley (Plants of the Santa Cruz Valley at Tucson by Kathryn Mauz, vol. 18, no.1).

Read the Pima County Memorandum recommending the acquisition of the West Branch parcels for open space conservation: Rosen, P.C., Biological Values of the West Branch of the Santa Cruz River (2001).

Please email me with a question or comment.


Page maintained at the University of Arizona Herbarium:
http://cals.arizona.edu/herbarium/sites/cals.arizona.edu.herbarium/files/old_site/assoc/projects/westbranch/

html last updated 3 June 2010