GENUS 9. ORCHID FAMILY. 555 



Three species or more, natives of northern North America. Type species : Piperia elegans 

 (Lindl.) Rydb. 



i. Piperia unalaschensis (Sprang.) Rydb. Alaska Piperia. Fig. 1369. 



Spiranthes unalaschensis Spreng. Syst. 3: 708. 1826. 



Habenaria unalaschensis S. Wats. Proc. Am. Acad. 12: 

 277- 1877- 



P. unalaschensis Rydb. Bull. Torr. Club 28: 270. 1901. 



Stem strict, i-2 tall; lower leaves oblanceolate, 

 4'-6' long, obtuse or acutish ; upper leaves lanceolate 

 to linear-lanceolate, alternate; spike 4'-i2' long; 

 bracts lanceolate or ovate-lanceolate, shorter than the 

 flowers ; flowers greenish ; lateral sepals oblong- 

 lanceolate; petals lanceolate, nearly as long as the 

 lateral sepals ; lip oblong-lanceolate, somewhat has- 

 tately dilated at the base. 



In moist woods, Alaska to California, Colorado, Quebec 

 and Ontario. June-Sept. 



10. LYSIAS Salisb. Trans. Hort. Soc. i : 288. 1812. 



Plants with tubers or fleshy roots ; stem scapose. Leaves 2, basal. Flowers greenish or 

 white; sepals free, large and spreading; petals small and narrow; lip entire, linear or nearly 

 so; spur long and slender, generally longer than the elongated, straight ovary. Beak of the 

 stigma without appendages. Anther-sacs widely diverging, their narrow beak-like bases pro- 

 jecting forward; stalk of the pollen-mass laterally affixed to the back of the orbicular gland, 

 whose face is turned inward. Pod cylindric-clavate, distinctly stipitate. [Named for Lysias, 

 an Attic orator.] 



A circumboreal genus of about half a dozen species. Type species: Lysias bifolia (L.) Salisb. 



Scape bracted. i. L. orbiculata. 



Scape naked. 2. L. Hookeriana. 



i. Lysias orbiculata (Pursh) Rydb. Large Round-leaved Orchis. Fig. 1370. 



Orchis orbiculata Pursh, Fl. Am. Sept. 588. 1814. 

 Habenaria macrophylla Goldie, Edinb. Phil. Journ. 6: 331. 



1822. 



Habenaria orbiculata Torr. Comp. 318. 1826. 

 L. orbiculata Rydb. in Britton, Man. 294. 1901. 



Scape stout, bracted, i -2 high, occasionally bearing 

 a small leaf. Basal leaves 2, orbicular, spreading flat 

 on the ground, shining above, silvery beneath, 4'-7' in 

 diameter; raceme loosely many-flowered; pedicels 

 nearly $' long, the fruiting ones erect ; flowers greenish 

 white ; upper sepal short, rounded ; lateral sepals 

 spreading, falcate-ovate, obtuse 4"~5" long; petals 

 smaller; lip oblong-linear, entire, obtuse, white, about 

 6" long; spur longer than the ovary, often lY long; 

 anther-sacs prominent, converging above; glands small, 

 orbicular, nearly i' apart, their faces turned toward 

 the axis. 



In rich woods, Newfoundland to British Columbia, North Carolina and Minnesota. Ascends 

 to 4500 ft. in Virginia. Large two-leaved orchis. Heal-all. July-Aug. Races differ in the size 

 of leaves and in length of the spur. 



