FAM. 45. 41 



in an inflorescence; perianth 6-parted, the 3 sepals and 2 

 of the petals similar in form, but the third petal (lip), 

 different. Stamens 1 or more, united with the style into a 

 column; anthers 1 or 2, containing 2, 4 or 8 waxy or powdery 

 pollinia; ovary inferior, 1-celled. more or less twisted; 

 style 1, stigma a viscid surface; fruit a 3-valved capsule; 

 seeds minute, numerous. 



Anther one, adnate to the column, erect, persistent, - - 2 



Anther one, attached to the apex of the column like a lid, deciduous, - 4 



Lip spurred. -___-_-____. 3 

 Lip spurless, with two callosities at the base; — flowers in terminal 

 more or less spiral spikes, small, white or yellowish. In damp 

 soil. - - Gyrostachis (Spiranthes), Twisted Qrchis or Ladies' Tresses, 



G. gracilis. Stem slender, scape-like; spike one-sided or spiral. Summer. 



G. praecox (S. tortilisl. Stem tall and slender, spike spiral. Summer. 



G. odorata. Stem stout, leafy; spike thick, spiral. River-banks. Fall. 



G. cernua. Stem scape-like, scaly; spike blunt not spiral. Fall. 



G. brevifolia. Stem scape-like, scaly; flowers in one row. Fall. 



Lip spurless narrowed into a claw; petals and lip adnate to the middle of 



the column; pollen-masses 4, powdery; flowers in a glandular pubescent 

 terminal raceme or spike, greenish. Flatwoods, - - Ponthieva 



P. glandulosa. Stem scape-like; leaves broad, radical. Fall. 



Lip fringed or cut-toothed; — flowers in terminal spikes, bracts some- 

 times leaf-like. In swamps. 



Blephariglottis (Platanthera), Fringed Orchis 



B. cristata. Stem stout, leaves linear, spike oblong; flowers small, yellow, with 



slender spur. Summer. 

 B. ciliaris. Stem stout, leaves oblong, spike oval; flowers large, orange, with 



slender spur. Summer. 

 B. Blephariglottis. Stem stout, leaves oblong, spike oval; flowers white, with 



slender spur. Summer. 

 Lip 3-parted, anther with slender appendages; — flowers in terminal 



spikes, stems leafy. In the flatwoods. - - Habenaria, Rein-orchid 



H. distans. Stem scape-like with oblong leaves at the base; spike few-flow- 

 ered, flowers white, spur club-shaped. Summer. 



H. repens. Leaves many, lanceolate, sheathing; spike many-flowered, flow- 

 ers greenish, spur filiform. Late Summer. 



H. quinqueseta (Michauxiit. Leaves oblong, spike few-flowered, flowers white, 

 spur long, slender. Summer. 



Lip entire or 3-toothed, anther without appendages; — stem with 

 alternate leaves. In pine-barren swamps. 



Gymnadeniopsis (Gymnadenia) 



G. ruvea. Stem slender with linear leaves on the lower part; spike cylin Inc. 

 flowers white or pink; ovary not twisted; spur filiform, not shorter than 

 the ovary. Summer. 



G. integra (flava). Stem slender with broadly linear leaves below; spike ob- 

 long, flowers orange-yellow; ovary twisted; spur filiform, shorter than the 

 ovary. Summer. 



Pollen in powdery masses, --------.5 



