506 ouciiiDACE^. (orchis family.) 



at the h;i<c nipple-sliiipcd. (Also S. Reckii, Lindl., at least as to the Northern 

 ])lant.) — Hilly woods and sandy plains: common. July -Oct. — Perianth 

 barely li"-:i" long-. 



G. S. simplex, n. sjj. Koot a soli/orij ob/on</ or spiinlli:-sliai>e(l tiilirr ; nc 

 leaves at lloweriny time; scape .5' -9' hi<;li, bcariiij; a small narrow (rarely 1- 

 sided) spike of very sliort Jiowera (perianth 1"- li" lon<;) ; lip thin, white, oliornte- 

 oblomj, the apex eroded and crisped, the callosities at the base slender. — Dry, 

 sandy soil, E. Mass. (Nantucket, Dr. Rohhins), New Jersey (C. F. Austin, ^c), 

 and Delaware, Win. M. Caidnj. Aug., Sept. — Spike l'-3' long. 



5. LISTERA, R.Brown. Twaybi.ade. 



Sepals and petals nearly alike, spreading or reflexed. Lip niostlj- drooping, 

 longer than the scpnls, 2-lobcd or 2-cleft. Column wingless: stigma with a 

 rounded beak. Anther borne on the back of the column at the summit, erect, 

 ovate: pollen powdery, in 2 masses, joined to a minute glatid. — Roots fibrous. 

 Stem bearing a pair of ojiposito sessile leaves in the middle, and a spike or ra- 

 ceme of greenish or brownish-purple small flowers. (Dedicated to Martin Lister, 

 an early and celebrated British naturalist.) 



* Column very sliort. ( Sepals ovate, rejlexed : plants delicate, 4' - 8' high.) 



1. L. COrd^ta, R. Brown. Leaves round-ovate, somewhat heart-shaped 

 (^'-1' long) ; raceme smooth; flowers minute, crowded, on pedicels not longci- than 

 the ovary ; Up linear, twice the length of the sepals, 1 -toothed on each side at the 

 base, 2-cle/}. — Damp cold woods ; from Penn. northward. June, July. (Eu.) 



2. L. australis, Lindl. Leaves ovate ; raceme loose and slender ; floweis 

 very small, on minutely (jiandular-pnhescent f>edicels twice the length of the ovary ; lip 

 linear, 3-4 tiines the length of the sepals, 2-parttd, the divisions linear-setaceous. 

 — Damp thickets, New Jersey to E. "Virginia and southward. June. 



* * Column longer, arching or straightish. 



3. L. eonvallarioides, Hook. Leaves oval or roundish, and sometimes 

 a little heart-siiaped (I'-lj' long) ; raceme loose, pubescent; flowers on slen- 

 der pedicels ; lip wedge-oblong, 2-lobed at the dilated apex, and 1-toothed on 

 each side at the base, nearly twice the length of the narrowly lanceolate spread- 

 ing sepals, purplish, y long. (Epipactis eonvallarioides, Swarts.) — Damp 

 mossy woods, along the whole Alleghany Mountains, to Penn., also Maine to 

 Lake Superior, and northward. — Plant 4' -9' high. 



6. ARETHUSA, Gronov. Aretiiusa. 



Flower ringcnt ; the lanceolate sepals and petals nearly alike, united at the 

 base, ascending and arching over the column. Lip dilated and recurved spread- 

 ing towards the summit. Column adherent to the lip below, petal-like, dilated 

 at the apex. Anther lid-like, terminal, of 2 approximate cells : pollen-masses 

 powdery-granular, 2 in each cell. — Beautiful low herbs, consisting of a sheathed 

 scape from a globular solid bulb, terminated usually by a single large rose-pur- 

 ])le flower. Leaf solitary, linear, nerved, hidden in the sheaths of the scape, 

 protruding after flowering. (Dedicated to the Nymph Arethusa.) 



