22 LENTlBULACEvE. Utricularia. 



in prodr. 8. p. 7. U. gibba, Torr. Jl. I. p. 19, not of Linn. U. fornicata, Le Conte, I. c. 1 

 Perennial. Leaves furnished with air-bladders. Scape 2-3 inches high. Flowers scarcely 

 one-founli as large as in U. vulgaris, dull yellow. Lower lip nearly flat. 



In ponds and swamps. Near Albany and Schenectady (Dr. L. C. Beck <^ Mr. Tracy). 

 Fl. June. This species also is a native of Europe. 



I have another species of Utricularia, collected nearUtica by Dr. Knieskern, which I am 

 unable to determine, from the dried and rather imperfect specimens. Its general appearance 

 is that of U. vulgaris, but the flowers are scarcely one-third as large as in that species. The 

 spur is short, thick, and very obtuse. At the base of the scape, and along the submerged 

 stem, there are scattered 1-flowcred peduncles. The same plant has been found near Boston, 

 by B. D. Greene, Esq. 



Order LXV. OROBANCHACEiE. L. C. Rich. The Broom-rape Tribe. 



Calyx persistent, 4 - 5-toothed or somewhat 2-lipped. Corolla withering or 

 persistent, tubular or tubular-campanulate, with a 2-lipped or irregular limb. 

 Stamens 4, didynamous. Ovary one-celled, with 2 — 4 parietal placenta9. 

 Capsule enclosed in the persistent corolla, 2-valved. Seeds very numerous, 

 minute. Embryo minute, at the apex of fleshy transparent albumen. — Para- 

 sitical herbs, growing on the roots of other plants, destitute of green foliage, 

 and with brownish or colored scales instead of leaves. Flowers solitary or in 

 sj'ikes, sometimes polygamous. 



1. OROBANCHE. Linn.; Hook. Jl. Bor.-Am. 2. p. 91. broom-rape. 



[ From the Greek, orolos, a vetch or leguminous plant, and anchcin, to strangle ; from its supposed injurious effects.] 



Flowers perfect. Calyx 2 - 5-cleft ; the segments often unequal. Corolla tubular ; the limb 

 somewhat ringent : upper lip entire or 2-lobed , the lower 3-lobed. Anthers 2-celled. 

 Stigma mostly 2-lobed. Capsule ovoid : placentas 2 or 4. — Scapes mostly simple : flowers 

 solitary or spiked. 



• CoNoi'iioi.Ts, Wallr. Flmccrs perfect. Calyx vmliicose-fiibvlar, n-ilh two bradeoUs at the base, irregvtnrhj i - 5-toothett. 

 Corolla ringmt : vjrper lip 2-lt>bal ; lower cquaUij Z-lobcil . Anl/ier-ccUs somctokat diverging at the base, mucronate. 

 Placenta: 4, approximated in pairs. 



1. Orobanche Americana, Linn. " " Squaw-root. 



Stem clothed with ovai-lanceolate acute scales ; flowers in a thick smooth spike ; caly.x 

 unequally 4 - 5-clcfl ; corolla a little curved, unequally 5-lobed, ventricose below ; stamens 



