506 GYNANDRIA MONANDRIA 



lip lance-linear, obtuse; spur longer tlian the ovary. Beck, Bat. 



p. 347. 



Orchis rotundifolia. Mkhlf Catal. p. 80. Nutt. Gen. 2. p. 189. 



Not of Pursh. 



O. orbiculata. Pursh, Jim. 2. p. 588. Bigel. Bost. p. 310. 



Habenaria orbiculata. Torr. Comp. p. 318. Eat. Man. p. 163. 



Orbicular Platanthera. 



Root perennial, of coarse fleshy fasciculate fibres. Leaves a single pair at the 

 base of the scape, 4 to 6 inches Ion?, and 3 to 5 inches wide, orbicular, iuclining 

 more or less to ovate, smooth, fleshy, bluish green, subsessile, spreading flat on 

 the ground, with 1 or 2 membranaceous sheaths below them embracing the scape. 

 Scape 9 to 18 inches high, somewhat angular, smooth, bearing about 3 small alter- 

 nate lanceolate sessile bracl-Iikc leaves. Floxcers numerous, in a loose terminal 

 bractcate raceme 4 to 6 inches in length ; bracts lanceolate, nearly as long as the 

 pedicel and ovary. Outer segments of the perianth green, longitudinally veined, 

 minutely papillose, the upper one ovate, obtuse, the inner ones white ; lip longer 

 than the segments, sublincar, entire, obtuse; spur subclavate, longer than the 

 o? ary and pedicel ; pollinia clavate, or pyriform, lodged in a groove, one on each 

 •ide of the erect arch over the throat of the flower ; ovary oblong, angular, epi- 

 rally twisted, pedicellate. 

 Ilab. Moist woodlands; West Chester: rare. Fl. June. Fr. 



Obs. This was first detected here, in 1835, by Mr. Joshua IIoopes, in ration's 

 woods, near the Borough of West Chester ;— a circumstance somewhat remark- 

 able,— as the locality has been diligently explored, almost every jcason, for the 

 last twenty years. There is one other species in the U. Stales. 



406. HABENARIA. mild. JSTutt. Gen. 707. 

 [Latin, Habena, a thong, or rein ; in allusion to the long spur of the lip.] 



Perianth ringent. Lip dilated, toothed, lobed, or fringed, spurred at 

 base. Pollinia pedicellate ; glands of the pedicels naked, distant 



1. H. iierbiola, Br. Lip oblong, obtuse, toothed on each side at 

 base; palate 1 -toothed ; spur filiform, shorter than the ovary ; bract* 

 rather erect, longer than the flowers. Beck, Bot. p. 347. 

 Orchis herbiola. Pursh, Am. 2. p. 743. Florid. Cestr. p. 93. 



Root perennial, of coarse fleshy fasciculate fibres. Stem 12 to 18 inches high, 

 simple, somewhat angular and flexuose, smooth, leafy, with 1 or 2 oblong sheaths 

 at base. Leaves about 3, alternate, 3 to 6 inches long, and 3 fourths of an inch to 

 2 inches wide, varying from elliptic-lanceolate to lance-oblong and linear-lance- 

 olate, mostly acute, s.nooth, sessile and sheathing at base. Flowers rather small, 

 in a terminal bracteate spike 3 to 6 or 8 inches in length ; bracts lanceolate, acu- 

 minate, 3-nerved, smooth,— the lowest ones elongated, foliaceous, 2 or 3 times as 

 long as the flowers, gradually shorter above, the upper ones scarcely as long as 

 the flowers. Segments of the perianth ovate-oblong, obtuse, the outer ones green, 

 the inner ones greenish-yellow; lip ovate-oblong, obtuse, with a tooth on eacU 

 side at base, and a toothlike process or elevation on the palate; spur slightly 

 clavate, rather shorter than the sessile ovary. 



Hab. Swampy thickets : frequent. Fl. June. Fr. September. 



Obs. This species has been found in various places within tho County, siace 

 my Catalogue was published. 



2. H. bracteata, Br. Lip linear-oblong, the apex bifidly emargin 

 ate, with an obsolete central tooth; segments of the perianth conniv- 



