280 Part II. 
Juglans californica Wats. 
Alnus rhombifolia Nutt. 
Vitis californica Benth. 
Rosa californica C. & S. 
Rubus vitifolius C. & S. 
Chapter 3. 
| Acer californicum Greene. » 
| Rhus diversiloba T. & G. ° 
| Quercus Wislizeni DC. 
| Cornus pubescens (= C. occidentalis 
| T. & G.) Nutt. 
On small islands in the swamps, the indigenous growth is rank; Aypericum 
 mutilum, Eclipta alba, Bidens frondosa, Lippia lanceolata, Amaranthus hypo- 
chondriacus, Lippia cuneifolia. An evident relationship exists between this 
flora and the riparian one of the lower Mississippi River and its tributaries. 
The plants to be mentioned in this connection are: /snardia palustris, Pluchea 
camphorata, Eclipta alba, Lippia lanceolata, Cyperus diandrus var. castaneus, 
C. erythrorhizos, C. stenolepis. Fully fifty per cent of plants in the following 
list are common, although not peculiar to this region and the Mississippi. 
Lathyrus Jepsoni Greene. 
Psoralea macrostachya DC. 
Glyeyrrhiza glutinosa Nutt. 
Euphorbia serpyllifolia Pers. 
Hibiscus californicus Kell. 
Hypericum mutilum L. 
Polygonum Muhlenbergii Wats. 
» Hartwrightii Gray. 
» acre H.B.K. 
» nodosum Pers. 
Atriplex coronata Wats. 
> spicata Wats. 
> hastataL.v.oppositifoliaMoq. 
Epilobium paniculatum Nutt. 
» olosericeum Trelease, 
> californicum Haussk. 
Boisduvalia densiflora Lindl. & Wats. 
Isnardia palustris L. 
Jussiaea diffusa Forsk. var. californica 
Ammannia coccinea Rottb. [Wats. 
Nasturtium (Roripa) dictyotum Greene. 
Hydrocotyle prolifera Kell. 
Sium heterophyllum Greene. 
Solidago californica Nutt. 
> elongata Nutt. 
Euthamia occidentalis Nutt. 
Aster exilis EI. 
» Douglasii Lindl. 
Gnaphalium palustre Nutt. 
Baccharis Douglasii DC. 
Pluchea camphorata DC. 
Eclipta alba Haussk. 
Helianthus californicus DC. 
Bidens frondosa L. 
» laevis (L.) BS.P. 
Ambrosia psilostachya DC. 
Artemisia vulcaris L. v. californica Bess. 
Apocynum cannabinum DC. 
Heliotropium curassavicum L. 
Convolvulus sepium L. 
Solanum Douglasii Dunb. 
Stachys albens Gray. 
> ajugoides Benth. 
Pogogyne Douglasii DC. 
Lycopus sinuatus EIl. 
Verbena hastata L. 
Lippia cuneifolia Steud. 
»  lanceolata Michx. 
Urtica holosericea Nutt. 
Sagittaria variabilis Engelm. 
Alisma plantago-aquatica L. 
Scirpus lacustris L. 
> tatula. 
Cyperus diandrus, var. castaneus Tort: 
» erythrorhizos Muhl. 
» stenolepis Torr. 
The herbaceous plants of the Californian plain are chiefly annual, and the 
rapidity with which they attain their full size, perfect their seed and pa 
