S6 TRIANDRIA MONOGYXIA. 



eniarginate, tube persistent, calicine. Stamina 

 exsertcd. Seed 1, coriaceous)^ coated, obconic, 

 with 5- furrows. 



Annual or perennial; stem lierbaceous, leaves opposite; 

 flowers axillary and dichotomously paniculate, or corym- 

 bose, from 1 to 5 in a common expanding- campanulate, or 

 almost peltate involucrum, extremely evanescent, and ge- 

 nerally small, 5-parted, laminx deeply emarginate, the 

 base persistent and calicine, investing- the seed. Stami- 

 na 3, 4 and 5. Stigma capitate. — Xearly allied to the pre- 

 ceding genus, and also to J firabHis. 



Species. 1. mjctagiiiea. Mich. 



Obs. Entirely smooth; stem jointed, leaves broad cor- 

 date, acute; flowers for the nio^t part corymbosely ag- 

 g-regate, and terminal, also axillary; in stems imperfectly 

 developed, all axillary; involucrum 5-cleft, 3-5-flowered, 

 (and as in all the otlier species, at length much larger 

 than the fruit.) 



Hoot large and tuberous, probably medicinal. — On the 

 alluvions of the Missouri, common- 



2- Albida. Walter. O, 3. * pilosa. Stem nearly erect, 

 hairy; leaves oval or lanceolate-oval, obtuse, entire; flow- 

 ers sub-paniculate, axdlary and terminal; involucrum 

 about 3-flowered. 



Obs. Leaves sometimes hairy; nearly allied to tlie C, 

 vyctaginea. Flowers pale red, stamens exserted, root pe- 

 rennial. 



Habitat. Near the Missouri^ — around the Arikaree 

 village, 8cc. 



Allionia ovata. Pursh, vol. i. p. 97. The C. avata of 

 Peru appears to be but 1-flowered. 



4. C. hirsuta. Pursh, perhaps a variety of the above. 

 5. C *angustifolia. Stem round, erect, smooth; involu- 

 crum and peduncle pubescent; leaves linear, sessile, rare- 

 ly subdenticulate; flowers aggregate, paniculate, and ax- 

 illary; involucrum mostlv 3-flowered 



Obs. Root perennial, tuberous as the preceding; leaves 

 smooth; stem erect, a little branched above; seeds as in 

 all the i-est clavate, obconic, rather rugose, with 5 fur- 

 row s. Flowers pale red. Stamens exseited On liills 

 near the confluence of 1 eeton river, Missouri, and from 

 thence probably to the mountams. 



C. ungmtifolia. T. Nultall in Fraser's Catalogue. 1813. 



C.linearisy I'ursh, in Supplement, vol. ii. p. 728. 



6.*dccumbens. Stem round, decumbenti low; leaves en- 



