ORCHID A CEAE. 297 



8. Blephariglottis peramoena (A. Gray) Rydb. Fringeless Purple 

 Orchis. (I. F. T. n 13.) Stem 3-7 dm. high. Leaves elliptic or lanceolate, 1-2 

 dm. long, the upper gradually smaller ; spike 5-15 cm. long, 2.5-3.5 cm. thick, 

 densely or rather loosely many-flowered; flowers large, showy, violet- purple; lateral 

 sepals round-ovate, 6-8 mm. long, the upper one smaller ; petals smaller, round- 

 obovate, clawed, entire, or slightly erose ; lip 14-20 mm. long, the segments fan- 

 shaped, cut-toothed, not fringed, the middle one 2-lobed ; spur about as long as the 

 ovary, curved, clavate; glands orbicular, oblique. In moist meadows, N. J. to 111., 

 Va. and Ky. July- Aug. [H. peramoena Gray.] 



xi. POGONIA Juss. 



Mostly low herbs with slender rootstocks and fibrous roots, the flowers terminal, 

 solitary, the leaves alternate. Sepals and petals separate, erect or ascending. Lip 

 erect from the base of the column, spurless, crested. Column elongated, club-shaped 

 at the summit. Anther terminal, stalked, attached to the back of the column, its 

 sacs parallel ; pollinia 2, I in each sac, powdery-granular, without a caudicle. 

 Stigma a flattened disk below the anther. Capsule oblong or ovoid, erect. [Greek, 

 bearded, from the bearded lip of the type species.] Only the following North 

 American species are known : 



Sepals and petals nearly equal and alike; lip bearded. 1. P. ophioglossoides. 



Sepals longer and narrower than the petals; lip not bearded. 2. P. divaricata. 



1. Pogonia ophioglossoides (L.) Ker. Rose Pogonia. Snake-mouth. 

 (I. F. f. 1 114.) Stem 2-3.8 dm. high, 1-3-leaved, not rarely with a iong-petioled 

 basal leaf. Stem leaf or leaves 1-4 cm. long, lanceolate or ovate, erect, bluntly 

 acute ; flowers fragrant, pale rose-color, slightly nodding, large, solitary or occa- 

 sionally in pairs, subtended by a foliaceous bract ; sepals and petals about equal, 

 elliptic or oval, 12-20 mm. long ; lip spatulate, free or somewhat appressed to the 

 column below, fringed. Propagates by running rootstocks. In meadows and 

 swamps, Newf. to Ont., Fla. and Kans. June-July. 



2. Pogonia divaricata (L.) R. Br. Spreading Pogonia. (I. F. f. 11 16.) 

 Stem 2-6 dm. high, bearing a leaf near the middle, and a foliaceous bract near the 

 flower. Leaf lanceolate, or narrowly elliptic, obtuse, clasping, 5-10 cm. long ; 

 fluwer terminal, solitary; sepals linear, longer and narrower than the petals, diverg- 

 ing, dark-colored ; petals flesh-color, lanceolate, narrowed at the apex ; lip as long 

 as the petals, 3-lobed, crenulate or wavy-margined, greenish, veined with purple, 

 not bearded, the upper lobe long. In swamps, southern N. T. to Fla. and Ala. 

 Reported from Wisconsin. July. 



12. ISOTRIA Raf. 



Low herbs with a rootstock and fibrous roots. Flowers terminal. Leaves 5 in 

 whorl near the top of the plant. Sepals and petals separate, ascending, the former 

 generally longer than the latter. Lip erect from the base of the column, crested, 

 spurless, sessile. Anthers and pollinia as in Pogonia. Capsule oblong, erect. [Greek, 

 in equal threes.] Only the following species are known : 



Lip crested along a narrow line down the face ; peduncle as long as the capsule or longer. 



1. /, verticillata. 

 Lip crested over the whole face and lobes ; peduncle shorter than the capsule. 



2. /. affinis. 



i. Isotria verticillata (Willd.) Raf. Whorled Pogonia. (I. F. f. 1117.) 

 Stem 2.5-3 dm. high, from long fleshy roots. Leaves obovate, abruptly pointed at 

 the apex, sessile, 2-4 cm. long; flower solitary, erect or declined; peduncle 12-16 

 mm. long, in fruit usually equalling or exceeding the capsule; sepals linear, 3-5 

 cm. long, spreading, dark purple; petals linear, erect, obtuse, greenish yellow, 

 about 20 mm. long; lip 3-lobed, crested along a narrow band, the upper part ex- 

 panded, undulate, capsule erect, 2.5 cm. long or more. In moist woods. E. Mass. 

 to Ont., Wis., Ind. and Fla. May-June. [Pogonia verticillata (Willd.) Nutt] 



2. Isotria affinis (Austin) Rydb. Smaller Whorled Pogonia. (I. F. f. 

 1 1 18.) Smaller than the preceding species, stem 2-2.5 dm. high. Leaves 2-5 

 cm. long; flowers 2 or solitary, greenish yellow; peduncle 5-10 cm. long, much 



