118 PENTANDRIA. MONOGTNIA, 



Species. 1 E. JSfyctelea, 2. *ambigva. Decumbent, 

 and branching; stem ^Jabrous, somewhat glaucous; leaves 

 hirsute, hrate-pinnalifid, subses-ile. segments sublanceo- 

 late, ang-nlarh toothed or lobtd; ractmes opposite the 

 leaves, both lateral and terminal; flo ers small, scarcely 

 iong-er than tlie calix, seg-ments eniari;inate. 



Annual. Stem spr- ading-, 4 to 6 inches high. Calix 5- 

 parted, segments lanceolate-ovaie, per.vlsteiit. Corolla 

 subcampanulaie, shoit, 5 cleft, laminae short, roundish- 

 oval, emarginatf:, tube cylindric, upper part angular, with 

 10 nectariferous pores at its base. ls:amina from the base 

 of the tube; filanients short, noi exserted; anthers cordate. 

 Style very short, bifid. Ovarium conic-ovoid. Capsule 

 compressed, rounded-oval, 2-vaIv>-d, 4-cellefl, 4-seeded; 

 valvi-s sepiiferous, diss.pnnents, uuersrcting, crossing 

 each valve m two d vections. i^eed roundish, jjuuctate. 

 Peduncles reflected, w .en in fruit. 



Jn alluvial soils on the banks of the Missouri; common; 

 flowering in April and May. 



A Norih Amcj-ican genus. 



180. ANDROSACE. L, 



Flowers in an involucrate iimbell. — Calix S- 

 cleft, persistent. Corolla sal vei form, 5 lobed, 

 tube ovate, orifice ^iandulous. Capsule 1 -celled, 

 ovate-globose, 5-valved, m my-seeded. 



Annual or perennial Leaves radical; scapes numerous; 

 calix often angular; flo>vers usually small, and white. 



Species 1. A. occidentalis. Annual. Leaves ovate, 

 smooth, rather thick, and entire. Scapes solitary, or se- 

 veral from the same root, 1 lo 3 inches high, minutely pu- 

 bescent. Leaves of the involucrum oval, pedicells long, 

 1-flowered. Calix smooth, acute, angular, m.embranace- 

 ous betwixt the segmeiits. Corolla a liule shoiter than 

 the calix, salverform, white, orifice open, tube ovate, seg- 

 ments oblong, obtuse. Capsule globular, 1-celled, 5-valv- 

 ed. Seeds numerous, angular. 



On dry and elevated plains, from the Maha village to 

 the moun tarns, near the river Missouri; flowering in April. 

 Probably a mere variety (;f A. elo7igatai but the leaves are 

 entire, and the umbell of the same length both in flower 

 and fruit. 



The genus Androsace Is almost exclusively confined to 

 Europe, and most of the species are alpine; there is at the 

 same time, out of 12 species, 1 in Siberia, 1 in Cappado- 



