172 
Onagracese. Halorageee. 
185. Oenothera. Oenothera. VIII, 12. 
1. FIs large, yellow, open only at night.—Dikes, shores; 
completely naturalised (Virginia). 7 biennis L. 826. 
186. Ssnardia. fsnardia. IV, 25. 
1. Ls opp., oval, acute, entire. FIs solitary in the 1.-axils. 
Resembling 843.—Marsh-ditches; rare; T. V. Z. 6 
palustris L. 827 
187. Circaea. Enchanter’s Nightshade. II, 7. 
1. Peduncles without bracts. Ls flat, oval, rounded at the 
base, denticulate. Stem gen. hairy.—Shady woods; every¬ 
where. 6 . . . . . . Lutetiana L. 828. 
— Peduncles with very small setaceous, decid. bracts. Ls 
shining, oval, slightly cordate at the base, sinuate- 
dentate ......... 2 
2. Fr., through suppression of one cell, 1-celled. Stigma in¬ 
dented. PI. 10—15 cm. —Shady, mountain woods, among 
the trunks of rotten trees; distrib. (wanting in S.). 6; 
earlier than the last. .... aipina L. 829. 
— Fr. 2-celled. Stig. 2-lobed. PI. larger in every way than 
the last. C. alpina-Lutetiana auct. (but is not a hybrid). 
—Mountain woods; fairly distrib. 6 intermedia Ehrh. 830. 
188. Trapa. Water-nut. IV, 13. 
1. Upper ls floating, rosetted, rhomboidal, coarsely toothed 
in front, with inflated petioles thickened in the middle; 
lower ls opp., pinnatisect with capillary segments and 
resembling roots. FIs solitary in the 1.-axils, white. Fr. 
furnished with 4 spines, rarely with only 2 (T. verbanensis 
De Not.).—Stagnant water; T. (Lake Muzano); formerly 
also near Rheinfelden, Roggwyl (1870) and Elgg; the 
fruit is sometimes found among the debris of the ancient 
lake dwellings.. natans L. 831. 
35. Haloragese. 
189. Myriophyllum. Myriophyll. XXI, 19. 
1. Bracts of the fl.-whorls all pectinate-pinnatifid, some¬ 
times several times longer than the fls, and resembling 
cauline ls, sometimes (v. pectinatum Dec.) scarcely 
longer than the fls. —Stagnant water; distrib. 6 
verticillatum L. 832. 
— Lower bracts inciso-dentate, as long as, or rather longer 
than, the fls, the upper ones entire, shorter than the 
fls, so that the whorls form a leafless spike.—As the last. 6 
spicatum L. 833- 
