orchid ace j?. 359 



7. GYMNADENIA, R. Brown. Naked-gland Oncnis. 



Gr. gymnos, naked, and culcn, a gland. 



Flowers as in Orchis. Anther-cell parallel ; the ap. 

 proximate glands naked. 



Gr. tridentata, Lindl. Three-toothed Cymnadenia. 



Lower leaf oblong, rather acute ; upper leaf much smaller bract-like ; flowers 

 few, in an oblong terminal spike; Up wedge-oblong, 3-toothed at the apex. 



Wet woods, and swamp?. July. Stem slender, f> to 12 inches high, with a single 

 leaf. Spike 6 to 12-flowered, compact. F lowers pale yellowLh-green. Spur club- 

 shaped, curved upwards, longer than the ovary. 



8. PLATANTHERA, Richard. False Orchis. 



Gr.platus, wide, and anthera, an anther. 



Flowers as in Orchis, but with the lateral sepals spread- 

 ing. Anther-cells diverging at the base ; the two naked 

 glands widely separated. Lip with a spur at the base. — 

 Perennials, ivith spicatcor racemose flowers, often showy. 



* Scape 2-leaved at the base; spur very long; lip entire. 



1. P. orbiculata, Lindl. Round-leaved Orchis. 



Leaves very large, orbicular, spreading flat on the ground ; scape bracted, bear- 

 ing many flowers in a loose raceme ; upper sepal orbicular, the lateral ovate ; lip 

 iinear-spatulate, drooping, nearly 3 times as long as the sepals; spur curved, slen- 

 der, linear*club- shaped. 



Rich shady woods, Bear meadows, Centre Co., rare. July. Scapel to 2 feet high, 

 with several small oppressed scales. Leaves 2, very smooth, shining above, silvery 

 underneath, 4 to 8 inches wide. Flowers yellowish-green. Lip % to 1 inch long. 

 Spur 1% to 2 inches long. 



**Stem leafy ; lip entire about the length of the spur. 



2. P. SRACTEATA, Toit. Bracted Green Orchis. 



Lower leaves obovatc, the upper oblong, and gradually reduced to lanceolate 

 bracts; petals linear-lanceolate, erect; Up oblong-linear, truncate and minutely 2 

 to 3-toothed. 



Damj woods. June. Stem 6 to 12 inches high, with 6 to 12 small, gtefen flowors 

 in a loose spike. Lip more than twice the length of the sac-like, somewhat 2-lobed 

 spur. 



3. P. FLAVA, Gray. Yellowish Orchis. 



Stan leafy ; lower leaves oblong acute ; upper lanceolate, acuminate ; spike dense, 

 cylindric; petals ovate; lip .oblong, obtuse, toothed at the base, and with a small 

 protuberance on the palate ; spur filiform, rather shorter than the sessile ovary, 



Wet places. June — Aug. Stem 10 to 20 inches high, with small greenish-yellow 

 flowers, in a long spike at first dense, at length loose. Leaves about 3, with long 

 sheaths, 3 to 7 inches loDg, and % to 2 inches wide. 



* * * Stem leafy ; Up fringed along the side, undivided, shorter tlian the spur ; ovary 

 u-ith an acuminate beak. 



4. P. cristata, Lindl. Crested Orchis. 



lower leaves lanceolate, elongated, the upper gradually reduced to sharp-pointed. 



