78 



DISTRIBUTION OF PLANTS. 



Gen. Legum. (No. 1). Hard rigid stems and branches; leaves pinnate, rare; flowers 

 papilionaceous, yellow; pod like that of Miinosese. 



(Adesmia, No. 1) ; gen. Hedysar. Habit of Genista; hoary, and spiny, with small pin- 

 nate leaves; the flowers yellow; and the pod jointed. 



( No. 2). Herbaceous; the flowers yellow; the pod jointed. Growing on the 



tract of sand-hillocks. 



Latbyrus ? (No. 9) ; but the style smooth. The whole plant sericeous ; and the flowers 

 light-blue. 



Yicia ? (No. 4 ). Annual ; a small species. Growing on the river-bank, within reach of 

 the infiltration. 



Mimosa (No. 13). The flowers pale, with a "tinge of pink;" a long strap-shaped pod. 

 Gen. Mimos. (No. 1). Pinn. multijugis. " On the campos," Brackenridge. 

 (Vachellia? No. 1); gen. Mimos. A low shrub, with white thorns; the flowers in glo- 

 bular heads, yellow. 



Margyrocarpus (No. 1). Frequent; growing on the tract of sand-hillocks, and in other 

 upland situations. 



Lythrum (No. 4) ; the flowers very minute. Growing along the river-bank, within reach 

 of the infiltration. 



Gen. incert. (No. 1) ; Myrtus-like, but the venation difi"ers. A low shrub ; the leaves 



opposite, linear, hirsute. 

 Oenothera (No. 13). The flowers large, yellow, turning reddish in withering. Growing 



on the tract of sand-hillocks, and rather conspicuous. 

 Portulaca (No. 11). One of the most showy plants we met with, having large (reddish-) 



purple flowers. Growing on the tract of sand-hillocks. 

 Anychia ? (No. 8). The flowers axillary. 



? (No. 4); smaller and more upright. Found by Mr. Brackenridge. 



Tillsea (No. 6). On the muddy shores of the river. The specimens lost before they 

 could be re-examined. 



Brassica oleracea, (bis Peru, Polynesian Groups, New Zealand, Auckland Island, Aus- 

 tralia, and the United States). Cabbages were brought on board the Vincennes, but 

 the leaves proved coriaceous and hardly edible. The nearest cultivated spot, said to be 

 " twelve miles up the river." 



■ (rapa ; bis Polynesian Groups, New Zealand, and the United States) ; the 



turnip. The flowers yellow. Growing spontaneously along the sea-coast; doubtless 

 introduced. 



Erodium. The flowers small. On the tract of sand-hillocks. 



Melilotus (compare California). Annual; having the pod very small, one-seeded. (Ac- 

 cording to Gray, in his Volume on the plants of the Expedition, shown by the speci- 

 men to be " M. parviflora introduced from Europe.") 



Medicago. Annual ; having small leaves, and a crinited pod. Abundantly naturalized 

 on the " campos," judging from the withered vestiges, and the patches of soil covered 

 with a layer of pods. (Perhaps artificially disseminated ?) 



( ). Melilotus-like ; the flowers purple ; a smooth, hamate pod. On the tract of 



sand-hillocks. (According to Gray, in his printed Volume, shown by the specimen to 

 be "M. sativa introduced.") 



