This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Not Gillena Adans. 1763.]
Erect perennial herbs, with nearly sessile stipulate 3-foliolate or 3-parted leaves, and white or pinkish perfect long-pedicelled flowers in loose terminal panicles. Calyx cylindric, persistent, narrowed at the throat, 10-nerved, 5-toothed, the teeth imbricated, slightly glandular. Petals 5, linear-lanceolate, spreading, convolute in the bud, somewhat unequal, inserted on the calyx. Stamens 10-20, included; filaments short; anthers large. Carpels 5, villous-pubescent, opposite the calyx-lobes. Ovules ascending; style filiform. Follicles 5, 2-4-seeded. Seeds with endosperm. [In honor of Thomas Conrad Porter, Professor in Lafayette College.]
A genus of 2 species, of North America. Type species: Porteranthus trifoliatus (L.) Britton.
Leaflets serrate; stipules subulate, mainly entire.
Leaflets incised; stipules broad, foliaceous, incised.
1. Porteranthus trifoliÓtus (L.) Britton.
Spiraea trifoliata L. Sp. Pl. 490. 1753.
Gillenia trifoliata Moench, Meth. Suppl. 286. 1802.
Herbaceous from a perennial root, erect, branching, 2°-4° high, glabrous or somewhat pubescent. Stipules subulate, 2"-4" long, entire or serrate; leaflets short-stalked, oval, ovate, lanceolate or slightly obovate, acuminate at the apex, narrowed at the base, 2'-3' long, irregularly serrate; upper leaves often 3-lobed, or sometimes merely serrate; panicles few-flowered; pedicels slender; petals white or pinkish, 5"-6" long; calyx reddish; pods pubescent, subulate-tipped, little exceeding the calyx.
Gillenia stipulacea Nutt. Gen. 1: 307. 1818.
P. stipulatus Britton, Mem. Torr. Club 5: 115. 1894.
Resembling the preceding species, but generally more pubescent. Stipules foliaceous, broad, ovate, acuminate or acute, 4"-12" long, sharply incised-serrate; leaflets commonly narrower than those of the preceding, incised-serrate, or those of the lower leaves deeply pinnatifid; flowers commonly fewer and slightly smaller; pods less pubescent or sometimes quite glabrous.
In woods, western New York to Indiana and Kansas, south to Georgia, Louisiana and Oklahoma. Indian physic. June-July.