DIDTXAMIA. ANGIOSPERMIA. 55 



nerbaGeniis; stem simple, leaves alternate, sessile, pal- 

 rrutely clefl; (lowers solitary, uxillasv, sessile, n-.arcescent.; 

 some-.imcs subtended by coloured' bractes.—(C:dix irre- 

 g-iilar, long' and (ububir, in E. coccivea ov\y 2-iobcd, lobes 

 retiise, coloured, and slipbliy c maruir.iiti-; ctrolla constant 

 in form, slcndt-rly tubuiar, of an '(.bscure and greenish 

 yellow, upper lip'Sor 3 times thelent^th of tbe lov.er one, 

 entire; louvr lip trifid, sejj^ments plaiteci and acute. Sta- 

 mina seated upon nearly tbe same line of tbe orifice; 

 antbers smooth, long- and linear, all cohering- toi^-etherj 

 producing- a disk which is poliniferous at its surface, iii 

 consequence of this coherence tbe 2 lobes of each anther 

 are uutqual, tbe inner lobe bemg- always shorter. Style 

 very lon.uyand filiforn'; stip^mo. scarcely'bilobed. Capsule 

 ovate, acute, compressed and oblique, in tbe earliest stag-e 

 of tlie germ bi-.rstinsr ilie base of the corolla tube. Seeds 

 small, each inclosed in a reticulated membranous inflated 

 VvTSicle, attaclicd to the rcceptacular margins of the 

 traubverse septa. Proper receptacle obsolete. Is this 

 genus as distinct fi-om Castillcju as from Bartsio?) 



Species. 1. E. coccinea. Annual or biennial; leaves 

 > apd coloured br.icies divaricately trifid; cali.K bifid, nearly 

 equal with tbe corolla, segments rrtuse and ema)ginate. 

 (Bartsia coccinea, L.) 2. * gra7i(i:jicra. Perennial; "leaves 

 and uncoloured bractes mostly tnlid, seg-ment divaricate; 

 calix 4-clef% paitiy oblique; "corolla longer than tije ca- 

 lix, segments of tlie lower lip acuminate. Hab. On the 

 plains of the Missouri from tl-.e confluence of the river 

 Platte to the Mountains, common; also near the Prairie 

 duCiiien, Mississipp . Fi:,wering from April to Mav. Cas- 

 tilleja sessiUjlrjra. Ph. 2. p. 7i8. Obs. Stem simple, and with 

 the leaves pubescent. Flowers pubescent, slenderly tubu- 

 lar and curved, 2 to 3 inches long, greeiiish-white, a liitle 

 rosaceous; upper lip nearly green, attenuated; segments 

 of tiie lower lip linear-lanceolate, acuminate, shorter than 

 the upper, plaited. St\le and stamina smooth, enfolded 

 by the upper lip, exserted. Capsule and seed as in E. coc- 

 cinea. — A very distinct species, but inseparable in genus 

 from the preceding-, notwithstanding the di.sparity of the 

 callx, in every im[K)rtant particular besides thev agree; 

 otlier species will probably one day be discovered, con- 

 necting these 2 more closely. 



£43. BARTSIA. Z. 



Calix 4-clcft. Corolla ringent; upper lip con- 

 cave, entire, tbe lower trilid and reflected. Jin- 



