238 IIEPTANDRIA MOKOGYKIA 



1. A. Plantaoo, L. Leaves oval, subcordate, abruptly acuminate, on 

 long petioles ; fruit obtusely triangular. Beck, Hot. p. 378. 

 A. trivialis. Puntk, Am. 1.//.252. Ell. Sk. I. p. 434. 

 Plantain Alisma, Vulgo — Water Plantain. 



(i all. Pain deCrapaud. Ger. Der Froschlocfiel. Hisp. Llanten aquatico. 

 Root perennial, with a large bunch of fibres. Leaves 4 to G inches long, and 2 to 

 A inches wide, mostly 9-nerved, smooth, on petioles 6 to 9 inches long. Scape 1 to 

 2 feet high, trigonous, smooth, fistular. Panicle large (12 to 15 inches long), de- 

 compound, pyramidal, branches verticillalc, wilh lance-ovate acuminate involu- 

 cre-like bracts at the base of the verticils. Perianth with the outer segments (or 

 sepals) green, ovate, nerved, persistent ; the inner segments (or petals) white 

 often with a tinge of purple, suborbicular, larger than the outer ones, deciduous I 

 pedicels slender, striate, near an inch long, mostly in terminal verticils of 3 or 4. 

 Fruit subturbinate, truncate at apex, consisting of numerous carpels verticillatelv 

 arranged. 



Hob. Muddy rivulets, and miry places ; frequent. Fl. July. Fr. Sept.. 



Obs. This plant, some years ago, was the subject of much newspaper gossip, as 

 a specific for Hydrophobia; but it soon shared the fate of all such pretended reme- 

 dies. Two or three additional species have been enumerated in the U. States,— 

 of which the A. parvi/lora, Pursh, is probably only a variety of this. 



CLASS VII. HEPTANDRIA. 

 Order 1. Uloiiogviiia. 



192. TRIENTALIS, L. JYutt. Gen. 357. 

 [Latin, 7Wen*,ihe third part of a thing; being about one third of a foot high.] 



Calyx deeply 7 or 8-partcd. Corolla deeply 7 or 8-parted, rotate, 

 regular. Stamens 7 or 8, Ovary superior. Fruit dry, capsular, 

 opening at the sutures, 1-celled, many-seeded. 



Herbaceous: stem simple; leaves terminal, vcrticillately aggregated ; peduncles 

 1 -flowered, from the bosom of the leaves. Nat. Orel. '207. Lindl. Primulacb*. 



1. T. Americana, Pursh. J, eaves lanceolate, acuminate, obsolctelv 

 serrulate; corolla-lobes acuminate. Becky Bot. p. 289. Icon, Bart. 

 . Im. 2, tab. 48. 



T. europaea. Mr. Am I. p. 220. Muhl* Catal. p. 38. Not of WiUd* 



. lit. nor Lindl. 



T. curopcea, var. americana. Peru. Syn. 1. />. 402. NvtU Gen. I. p. 



242. var. angustifolia. Torr. Fl. 1. p. 383. 



American Trientalis. Vulgo — Chickweed Wintcrgrcen. 



Root perennial, creeping. Stem 4 to 8 inches high, slender, terete, smooth. 

 Leaves 2 to 3 inches long, and half an inch to an inch wide, mostly acuminate at 

 e ach end (sometimes obtuse and cmarginate at apex), smooth, subscssile, aggrega- 

 t h1 in a terminal whorl, with 2 or 3 small straggling ones on the stem. Peduncles 

 fj\v(l to 3 or 4), filiform, an inch to an inch and half long. Calyx-segments lance - 

 linear, very acute. Corolla white ; lobes oval lanceolate, acuminate, longer than 

 the calyx. Stame?is shorter than the corolla. Ovary globose ; style filiform. 

 longer than the stamens. Fruit a small dry coriaceous berry, or rather capsule, 

 smooth and shining. Seeds attached to a central spongy receptacle. 



Ifab. Shaded rivulets, on the Mica-slate hills : rare. Fl. May— June. />. July. 

 Obs. The only species of the genus in the U. States. 



