318 ORCHIDACEAE 
lateral sepals lanceolate 5-6 mm. long: lip 5-6 mm. long, cordate at the base, oblong, 
crisped and drooping above the middle or recurved at the tip ; callosities nipple-like, pro- 
jecting backward: capsules 7-8 mm. long, thick and club-shaped, curved. 
In moist ground, New York to Florida and Louisiana. Summer. 
4. Gyrostachys laciniàta Small. Nearly similar to G. praecor in habit, but more 
slender. Leaf-blades very narrowly linear: spike many-flowered : bracts ovate-lanceolate, 
long-acuminate, not scarious margined: lateral sepals linear-lanceolate, 6-7 mm. long, 
acute: lip barely as long as the sepals, finely laciniate, especially along the edges near the 
tip: capsules oval-obovoid, 6-7 mm. long. 
In sand, Eustis, Florida. Spring. 
5. Gyrostachys linearis Rydb. Roots several, coarse fibers : stems slender, 4-5 dm. 
tall, glandular-pubescent above: leaves mainly on the lower part of the stem ; blades nar- 
rowly linear, 5-10 cm. long, 2-4 mm. wide, mostly persistent: spike narrow, 4-10 cm. 
long, 8-10 mm. thick : bracts broadly ovate, scarious-margined, abruptly narrowed into the 
tip: perianth yellowish, about 8 mm. long: lateral sepals free, linear-lanceolate, placed 
so as to leave a space between them and the upper one which converges with the petals : 
lip oblong, cordate at the base, less curved than in G. praecox: capsules 5-6 mm. long. 
In meadows, New York to North Carolina. Summer. 
6. Gyrostachys xyridifolia Small. Roots tuberous, several: stems erect, 2-5 dm. 
tall, simple, glabrous or nearly so below the inflorescence, leafy to the top: leaves mostly 
at the base of the stem ; blades linear, attenuate from the broad sheathing bases or some- 
times slightly dilated toward the middle, 5-10 cm. long, the largest of the lower ones 
barely reaching the middle of the stem: spike 3-15 cm. long: bracts more or less imbri- 
cated, lanceolate to oblong-lanceolate : perianth whitish, pubescent without, 6-8 mm. long, 
curved and slightly nodding: lateral sepals linear-lanceolate, about 5 mm. long: lip 5-6 
mm. long, cordate at the base, with a rhombic-orbicular base and oblong much crisped 
drooping or recurved tip ; callosities nipple-like, projecting backward: capsules 7-8 mm. 
long, obovoid-clavate, curved. 
In moist ground, Florida and Texas. Spring. 
7. Gyrostachys brevifdlia (Chapm.) Kuntze. Roots often 3 together, coarse : stem- 
slender, scape-like, 2-4 dm. tall, pubescent above, furnished with clasping scales: leafs 
blades linear or narrowly linear-spatulate, 2-5 cm. long, early withering: spike 5-12 cm. 
long, 1-1.5 em. thick, flowers in 1 row, more or less spiral : perianth white, 8-12 mm. long: 
lip ovate, 7-8 mm. long, undulate, curved atthe apex, with 2 basal callosities. 
In pine-land swamps, Florida. Fall. 
8. Gyrostachys Reverchónii Small. Roots coarse: stems 3-6 dm. tall: leaf-blades 
various, those of the basal and lower stem-leaves linear or slightly broadened upwards, 
those of upper stem-leaves linear, 1-2 dm. long, acute or acuminate, reduced to sheathing 
bracts high up on the stem: spike long, about 1.5 cm. thick: bracts often as long as the 
flowers: perianth whitish : lateral sepals free, acutish : lateral petals obtuse : lip rhombic- 
ovate, 6 mm. long, obtuse, surpassed by the sepals and petals, slightly crisped near the 
apex ; callosities stout, slightly curved, pubescent at the base. 
On damp prairies, Louisiana and Texas. Spring. 
9. Gyrostachys parviflóra (Chapm.) Small. Roots 3-6 together, rather coarse: 
stems 2-4 dm. tall, minutely pubescent, especially above, commonly leafy to about the 
middle: leaf-blades linear to linear-oblong, 2-10 cm. long, acute or rather obtuse, contracted 
above the dilated base, reduced to sheathing scales from about the middle of the stem to the 
inflorescence: spike 2.5-8 cm. long: bracts lanceolate, acuminate, not surpassing the 
flowers: lateral sepals lanceolate from a somewhat dilated base, 5 mm. long, acuminate, 
slightly undulate above: lip drooping, about 5 mm. long, oblong or nearly so, not dilated 
at the base, slightly crisped above the middle, acutish ; callosities reflexed from the trun- 
cate-cordate base. [Spiranthes cernua var. parviflora Chapm.] 
In rich oak woods, near Rome, Georgia. Fall. 
10. Gyrostachys cémua (L.) Kuntze. Roots coarse, clustered : stems scape-like, 
1-6 dm. tall, furnished with sheathing scales: leaf-blades linear or oblong, 5-30 cm. long, 
nearly sessile or narrowed into petioles: spike 5-15 cm. long, 2-2.5 em. thick : flowers 
fragrant: perianth white, 8-10 mm. long: lateral sepals free: lip oblong or slightly 
broader at the base, 7-9 mm. long, crenulate at the apex, cuneate at the base ; callosities 
nipple-shaped, lateral on the base: capsules 6-8 mm. long. 
In meadows and swamps, Nova Scotia to Minnesota, Florida and Texas. Summer and fall. 
