126 



227. EPILOBIUM. 



somewkat decun-ent ; lowermost somewhat 

 stalked. Stem much branched. Stigma club- 

 like, p. 7. Wet. 



11. virgatum. " L. lanceolate, gradually 

 naiTowing from a rounded base, remotely 

 toothed, nearly sessile ; upper on short stalks. 

 Seeds obtuse. Stigma club-shaped or somewhat 

 4-cleft. (Runners slender, not forming rosettes, 

 Bab.) p. 7, 8. Meadows and moist woods. 

 Eug. G." — Koch. Resembles E. palustre. 



12. trigonum. L. opposite or in threes 

 or foui's, somewhat amplexicaul, oblongo-obo- 

 vate, acuminate, dentate ; uppermost alternate. 

 Stem nearly simple. Stigma club-hke. p. 7, 8. 

 Mountain meadows. Alps. Vosges. Resembles 

 E. roseum. 



13. roseum. L. stalked, oblongo-lanceo- 

 late, closely denticulate. Stem much branched. 

 Stigmas at first united. Seeds obtuse, p. 7. 

 Marshy streams. 



14. alsinifolium. L. somewhat stalked, 

 ovate, acuminate, remotely repando-dentate, 

 hairless. Stem few-flowered ; the raised lines 

 hairy. Seeds contracted into a neck. p. 7, 8. 

 Mountain springs. 



1.5. alpinum. L. somewhat stalked, el- 

 liptico-lanceolate, obtuse, mostly entii-e. Stem 

 2^3-flowered; the raised lines haiiy. Seeds 

 with a neck. p. 6, 7. Mountain rivulets. 

 Scotl. Alps. Pyi-. 



228. (ENOTHERA. 

 1. biennis. Stem harshly villous (roughish. 



somewhat hairy, Koch). L. ovato-lanceolate, 

 flat, denticulate. Stamens somewhat shorter 

 than corolla. Caps, nearly cylindrical, 4- 

 toothed, sessile, b. 7-9. Naturalized in 

 sandy soil. oca. 



2. muricata. Hairs of Stem scattered, 

 bidbous. L. lanceolate, flat, denticulate. Sta- 

 mens as long as corolla, b. 6-8. Gravelly 

 shores. Preibiirg in Brisgau, and on the Elbe 

 in Mecklenbm-g and Holstein. Nevers. 



229. ISNARDIA. 



1. palustris. Stem creeping, hairless. L. 

 opposite, ovate, acute, stalked. Fl. sessile, 

 axillary, solitary, without petals, a. 7. Wet 

 grassy, occ. 



230. CIRC^A. 



1. lutetiana. Stem erect, pubescent. L. 

 ovate, acuminate, dentate, dull, longer than 

 stalk. Rac. flowering to the base, without 

 bracteoles. p. 5-7. Shade. 



2. alpina. Stem ascending, nearly withou.t 

 hairs. L. cordate, dentate, shining, as long as 

 stalk. Rac. naked at base, with setaceous 

 bracteoles. p. 7, 8. Mountain shade. 



^. intermedia. Larger, and more like lute- 

 tiana. 



1. natans. 



backwards, a, 

 Em'ope. occ. 



231. TRAPA. 



Horns of the Emit 4, rough 

 , 6, 7. Still water, m. and s. 



XXXIV. HALOEAGE^. 



Mowers superior, inconspicuous. Stamens 1, 2, 4, or 8. Germen of 1 or more cells, each with 

 its style. Pruit dry, not bursting. Seed pendulous. 



232. jMYRIOPHYLLUM. 



1. verticillatum. El. in axillary whorls. 



Bracts pectiuato-pinnatifid. p. 7, 8. Stagnant 

 water. 



Bracts many times ex- 

 Pinnffi remote. 

 Bracts three times ex- 

 Pinnse approximate. 

 7. pectinatum. Bracts about equal to flowers. 



a. pinnatifidmn. 

 ceeding flowers. 



j3. intermedixim. 

 ceeding flowers. 



Pinnte almost touching. 



2. altemiflorum. Barren El. alternate, 



about 6 in a spike, at first nodding. Fertile 

 Fl. about 3, axillary at base of barren spike. 

 p. 7, 8. Clear, still, shady pools. G. Fr. rare. 



3. spieatum. Divisions of L. setaceous. 

 El. in leafless whorls. Spike always erect. 

 Upper Bracts entire, shorter than flowers, p. 

 7, 8. Still water. 



233. CALLITRICHE. 



1. verna. Lobes of Er. parallel, bluntly 

 keeled. Styles always erect, evanescent. 

 Bracts falcate. Lower L. linear; upper 



