VEGETATION GROUPS OF THE DESERT LABORATORY DOMAIN. 
Ill. Santa Cruz FLoop-PLsAIn— 
Continued. 
ANNUAL HERBS. 
Long-Lived Annuals, 
yAster parviflorus Gray 
= Macheranthera parviflora Gray. 
Atriplex bracteosa Wats. (?) 
ytAtriplex sp. 
Chenopodium leptophyllum Nutt. 
Chenopodium fremontii Wats. 
Conyza coulteri Gray (II). 
Cuscuta salina Engelm. 
Cyperus ferax Rich. 
Eclipta alba (L.) Haussk. 
Erigeron divergens T. & G. 
Euphorbia preslii Guss. 
Helianthus annuus L. 
Helianthus petiolaris Nutt. 
Heterotheca subaxillaris (Lam.) Britton 
& Rusby. 
Leptochloa imbricata Thurb. 
Lepidium thurberi Wooton. 
Martynia sp. 
Nama hispidus Gray 
= Conanthus hispidus (Gray) Heller. 
Parthenice mollis Gray. 
Petunia parviflora Juss. 
Portulaca retusa Engelm. (II). 
Samolus floribundus H. B. K. 
Verbesina encelioides (Cav.) B. & H. 
tWislizenia refracta Engelm. 
Winter Annuals. 
Androsace occidentalis Pursh (?) 
Bromus carinatus H. & A., var. arizonicus 
Shear. 
Corydalis aurea Willd., var. occidentalis 
Engelm. 
=Capnoides montanum (Engelm.) 
Britton. 
Hordeum pusillum Nutt. 
Lepidium sp. 
Monolepis nuttalliana (R. & S$.) Wats. 
Myosurus minimus L. 
+Oligomeris glaucescens Camb. (II). 
Phalaris caroliniana Walt. 
Platystemon californicus Benth. 
Poa bigelowii Vasey & Scribn. 
Polypogon monspeliensis (L.) Desf. 
Sisymbrium canescens Nutt. (I and IT) 
= Sophia pinnata (Walt.) Howell. 
Sisymbrium incisum Engelm. 
= Sophia incisa (Engelm.) Greene. 
Spheralcea coulteri (Wats.) Gray. 
Veronica peregrina L. 
Summer Annuals. 
Amaranthus palmeri Wats. 
Chloris elegans H. B. K. (II). 
Cyperus aristatus Rottb. 
= Cyperus inflexus Muhl. 
Eragrostis neo-mexicana Vasey (II). 
111 
III. Santa Cruz FLoop-PLAIn— 
Continued. 
ANNUAL HERBS. 
Summer Annuals, 
Eragrostis pilosa (I..) Beauv. (II). 
Eriochloa punctata (I,.) W. Hamilt. 
Ipomoea coccinea L,. 
= Quamoclit coccinea L. 
Ipomoea hederacea Jacq. 
Leptochloa viscida (Scribn.) Beal 
Leptochloa filiformis (lam.) Beauv., var. 
=Leptochloa mucronata (Michx.) 
Kunth. 
Panicum fuscum Sw. 
Physalis angulata L., var. linkiana (Nees.) 
Gray. 
IV. Santa Cruz RIVER AND IRRIGATION 
DITCHES. 
PERENNIAL HERBS. 
Agrostis verticillata Vill. 
Hydrocotyle ranunculoides L. f. 
Oenothera rosea Ait. 
= Hartmannia rosea (Ait.) Don. 
Paspalum distichum L,. 
Potamogeton pusillus L. 
Radicula nasturtium-aquaticum (L.) Brit- 
ton & Rusby 
= Roripa nasturtium (L.) Rusby. 
Zannichellia palustris L. 
ALGAY, 
Cladophora sp. 
Closterium sp. 
Hydrodictyon sp. 
Oedogonium sp. 
Penium sp. 
Spirogyra sp. 
Vaucheria sp. 
MISCELLANEOUS INTRODUCED SPECIES. 
SHRUBS. 
Arundo donax L. 
Nicotiana glauca Graham. 
Poinciana pulcherrima Sw., var. flava. 
HALF-SHRUBS. 
Marrubium vulgare L. 
PERENNIAL HERBS. 
Convolvulus arvensis L. 
Cynodon dactylon (L.) Pers. 
=Capriola dactylon (L.) Kuntze. 
Malva parviflora L. 
Plantago major L. 
*Rumex crispus L. 
Sorghum halepense (L.) Pers. 
