to the Rocky Mountains. 101 



(Jour. Acad. Phil. i. p. 384), and De Candolle (1. c). is 

 merely a robust variety of this plant. Mr. Elliott received 

 the specimens on which he established the species from me. 



104. Lupinus pusillus, Pursh f. ii. p. 468. Nutt. 

 gen. ii. p. 93. DC prod. ii. p. 408. 



105. L. decumbens, suflruticosus, subdecumbens ; flori- 

 bus pedicellatis, subverticillatis, bracteolatis ; calycibus seri- 

 ceo-hirsutis, labio utroque integro ; foliolis oblongo-lanceo- 

 latis, acutis obtusisque, subtus sericeis. 



Hab. On the southern branches of the Arkansa. 



Obs. Stems cespitose. Flowers scattered, and subverti- 

 cillate, about half as large as in L. perennis, purple. Leaves 

 about an inch long, somewhat silky beneath. Legumes small, 

 hairy. Appears to be allied to L. rupesiris of Humboldt. 



106. Acacia n. sp. Nutt. mss. Sources of the Canadian. 

 Leaves bipinnate, very irritable ; legumes linear, elongated, 

 smooth ; flowers capitate, white. Found also by Mr. Nuttall 

 in the Arkansa Territory. 



107. Darlingtonia intermedia, inermis, herbacea, gla- 

 bra; pinnis 8-9-jugis; foliolis 20-24-jugis, oblongo-lineari- 

 bus, glandula inter pumas infimas ; capitulis solitariis, axilla- 

 ribus, pedunculatis ; leguminibus falcatis. 



Desc. Stem herbaceous (and suffruticose ?) ; branches somewhat angu- 

 lar, slightly pubescent. Leaves bipinnate; pinnae 8-9 pairs, a small sessile 

 gland between the lowest pair; leaflets in about 22 pairs, oblong-linear, 

 scarcely two lines in length, mucronate, slightly falcate, appearing ciliate 

 on the margin under a lens. Flowers capitate, perfect ; heads small, on 

 long axillary peduncles. Calyx campanulate, 5-7-toothed ; teeth acute. 

 Petals 5, distinct, white. Stamens 5, scarcely exserted ; anthers oblong, 

 smooth. Germen sessile, acuminate with the style. Legumes crowded 

 (15-20), nearly an inch long, about 2 lines broad, falcate, 2-valved, 5-6- 

 seeded. Seeds oblong, compressed. 



Hab. On the Canadian ? 



Obs. The genus Darlingtonia was established by De Can- 

 dolle, in 1825.* It included only the Mimosa glandulosa and 



* Ann. scien. nat. Jan. 1825, iv. p. 97. 

 Vol. II. 23 



