Order 138.— ORCHID AOE^. 689 



connivent and curved upwards, lip recurved almost to a half circle, channeled, its 

 base embracing the column. — Sandy soils, S. Ga. Fla. to La. (Described from an 

 imperfect specimen resembling a Spiranthes.) St. 10 to 20' high. Lvs. 1 to 2' 

 long. Perianth scarce 5" long, greenish-white. Sept., Oct. 



i4. SPIRANTHES, Rich. Ladies' Tresses. (Gr. a~elpov, a 

 wreath ; sc. the twisted spike.) Perianth ringent; lower sepals oblique 

 and including the base of the lip; upper sepal connivent with the 

 petals ; lip oblong, channeled, parallel with the column, and with callous 

 processes at base; column curved, stigma ovate, rostrate, becoming 

 bidentate at apex ; anther dorsal ; pollinia 2, each 2-lobed, powdery. — 

 St. scape-like, bearing many white fls. in an oblique, spiral row. 



* Spike with the rachis twisted, and the flowers in one moderately twisted row Nos. 1, 2 



* Spike with the rachis straight but the flowers in a dense spiral all around Nos. 8, 4 



1 Lb gracilis Bigelow. Slender Ladies' Tresses. Lvs. all radical, ovafe or ob- 

 lanceolate, fugacious ; scape with remote sheaths ; fis. in a single row, which is 

 moderately spiral ; lip oblong-spatulate, crenulate-wavy at the recurved tip, tho 

 callosities distinct ; plant nearly glabrous. — A very delicate plant, not uncommon 

 in old woods, Can. and U. S. Scape very slender, 8 to 12' high. Lvs. close on 

 the ground, 1 to 2' long, contracted to a petiole, usually withering before the 

 flowers appear. Fls. white, fragrant. Rachis twisted more than the row of 

 flowers, but in the opposite direction. JL, Aug. 



2 L. tortilis Ph. Tall, slender; lvs. mostly at base; long and linear; the cauline 

 distant and sheathing ; bract-like ; fls. in a single row, moderately twisted, on a 

 twisted rachis; perianth elongated (5"); lip oblong, acute, pinnaldy lobed, lobe* 

 crenulate ; plant more or less pubescent above. — Grassy plains, Car. to Ala. and 

 Fla. St. 2 to 3f high, stouter than in S. gracilis. Lvs. 6 to 10' long, 2 to 5" wide. 

 Spike 3 to 5' long. Jn. Jl. 



3 S. cerrma Rich. Lvs. linear-lanceolate, the lower elongated, the cauline gradually 

 smaller ; spike dense-flowered, thick, oblong, the flowers oblique and cernuous ; 

 lip oblong, obtuse, wavy and crenulate, recurved, longer than the petals ; plant 

 pubescent above. — Can. and IT. S., common in meadows, &c. St. 9 to 18' or more, 

 somewhat leafy. Lvs. 3 to 6 to 10' long, 3 to 6" wide. Spike 1 to 3' long. Fls. 

 large for the genus, fragrant. Perianth 4 to 5" long, «cream- white. Aug. — Oct 



4 S. latifolia Torr. Lvs. nearly radical, oblong or linear-lanceolate, 3 to 5-veined ; 

 st. with 2 or 3 sheathing bracts; fls. (small 3 to 4") in an oblong, dense spike 

 which i3 somewhat twisted ; lip oblong, obtuse, crenulate-crisped on the margin. 

 about 5-veined, callosities adnate ; plant quite glabrous. — In moist grounds, C&— 

 to Penn. A low plant, often concealed in the grass, 4 to 8' high. Lvs. 3 or 

 more, 2 to 4' long, often obtusish. Fls. rather larger than in No. 1, white, the 

 lip yellowish, with green lines. Jn., Jl. 



15. G00DYE v RA, R. Br. Rattlesnake Plantain. (Named for 

 John Goodyer, an obscure English botanist.) Perianth ringent ; calyx 

 inflated, upper sepals with the petals vaulted, the two lower sepals 

 placed beneath and including the saccate, entire lip, which is without 

 callosities and abruptly acuminate and reflexed at apex ; anther on the 

 back of the free column ; pollinia 2, composed of angular grains. — 

 Bracted scapes arising from creeping rhizomes, with radical, ovate lvs, 

 and a downy spike of small white fls. 



1 G. repens R. Br. Lvs. ovate-lanceolate, obscurely reticulated with white, lip 

 ovate, with an oblong, obtuse acumination ; column acutely 2-horned at the sum- 

 mit; spike secund or slightly twisted, minutely pubescent. Rocky mountain 

 woods, Can. to Car. St. slender, 5 to 8' high, bearing a spike 2 to 3' long. Lvs. 

 9 to 12" in length, curiously netted with white lines, but less so than tho next 

 (which is scarcely distinct from this). Jl., Aug. 



2 G. pubescens R. Br. Lvs. ovate, and conspicuously reticulate with while ; 



44 



