484 C'Kciiin.vrK.K. (oKciiis family.) 



eiipd hut not crested, ratlier shorter tliaii tlic j)et!ils, longer than the column. 

 — Hich sliaily wood.s, Mithlh' Florida, and northward. .Inly - Aupnst. — 

 Stem 4' -8' Ingh. Leaves 6" -9" long 



• • SeiHils (broini) linear, spnailintf, much lotif/rr thun the erect jieltils : lip 

 cresteil, 3-lolH>fl. 



3. P. divaricata, U. lir. Leave.** 2, sessile, lanceolate, one near the 

 mi<ldh' of till' sttni, the other smaller and bratt-like at the hitse of the solitary 

 terminal Hower; sejjals purplish brown, broadly linear, anil, like the Hesh- 

 cidored lanceolate j)etals, recurved at the a])C.\ ; li|> half-cylindrical, wavy and 

 crenulate on the margins, 3-lolied at the apex, greenish veined w ith purple ; 

 crest beardless. — Swamjis, Floriila to North ("aroliuiV. May. — Stem l°-2° 

 high. Leaves 2' -5' loug. Sejjals 1'- U' long. 



4. P. verticillata, Nutt. Leaves .'), obovate-oblong, abruptly jiointed, 

 whorlcd at the liasc of the solitary reddish brown flower; se|)als linear, spread- 

 ing, three times as long as the erect oblong yellowish petals, ami yellowish .3- 

 lobed wavy lip. — l^ow .^hady wools, rare. May. — Stem 1° high. Leaves 

 enlarged in fruit. Flower peduncled. Sepals 2' long. 



14. ARETHUSA, Gronov. 



Sepals ami petals alike and nearly equal, cohering at the base, arching and 

 conuivent over the column. Lip adnate to the base of the column, dilated 

 and bent downward above the middle, crested within. Column incurved, ex- 

 panded and petal-like at the apex. Anther terminal, lid-like, with the cells 

 approximate. Pollen masses 4, powdery. — Scape erect from a solid globular 

 tuber, sheatlied, bearing a single large terminal flower. 



1. A. bulbosa, L. — Bogs on the mountains of Carolina (Micfiaux), and 

 northward. May. — Scape 6' -9' high. Sheaths 3-4, the uppermost en- 

 closing a linear late developed leaf. Flower l'-2' long, 2-bracted, bright 

 purple and fragrant. 



15. VANILLA, Swartz. 



Lip adnate to the column, convolute ; perianth jointed at the base, .«spread- 

 ing. Column naked. Pidlen masses 2. — Stem climbing by rootlets. Leaves 

 jointed at tlie base. Flowers large, in axillary racemes. Capsule pulpy 

 within. 



1. V. planifolia, Andr. Stem cylindrical ; leaves fleshy, oblong, acute, 

 contracted at tlie base (5' -7' long); bracts leafy; flowers (2' long) green, 

 the sepals and petals lance-oblong ; lip serrate at the apex, thickened below, 

 slightly crested in the middle ; capsule cylindrical (6' long). — Borders of the 

 Everglades (Curtiss). 



16. ORCHIS, L. Orchis. 



Sepals and petals nearly ecjual, arching and connivent over the column, or 

 the lateral sepals spreading. Lip adnate to the base of the column, depend- 

 ing, spurred at the base. Anther terminal, erect, the cells contiguous and 

 parallel. Pollen-masses 2, waxy, stalked, and, with the two distinct glands, 

 enclosed in a common sac or fold of the stigma. — Stem mostly scape-like, 

 leafy at the base. Flowers showy, spiked. 



