484 OBCHIDACE.E. (ORCHIS FAMILY.) 



ened but not crested, rather shorter than the petals, longer than the column. 

 Rich shady woods, Middle Florida, and northward. July -August. 

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



* * Sepals (brown) linear, spreading, much longer than the erect petals : lip 



crested, 3-lobed. 



3. P. divaricata, R. Br. Leaves 2, sessile, lanceolate, one near the 

 middle of the stem, the other smaller and bract-like at the base of the solitary 

 terminal flower ; sepals purplish brown, broadly linear, and, like the flesh- 

 colored lanceolate petals, recurved at the apex ; lip half-cylindrical, wavy and 

 crenulate on the margins, 3-lobed at the apex, greenish veined with purple ; 

 crest beardless. Swamps, Florida to North Carolina. May. Stem l-2 

 high. Leaves 2'- 5' long. Sepals I'-l-J-' long. 



4. P. verticillata, Nutt. Leaves 5, obovate-oblong, abruptly pointed, 

 whorled at the base of the solitary reddish brown flower ; sepals linear, spread- 

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

 lobed wavy lip. Low shady woods, rare. May. Stem 1 high. Leaves 

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



14. ARETHUSA, Gronov. 



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

 connivent 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, sheathed, bearing a single large terminal flower. 



1. A. bulbosa, L. Bogs on the mountains of Carolina (Michaux),anA 

 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. Pollen masses 2. Stem climbing by rootlets. Leaves 

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

 within. 



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

 contracted at the 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 ( Curfiss). 



16. ORCHIS, L. ORCHIS. 



Sepals and petals nearly equal, 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, 

 leafv at the base. Flowers showy, spiked. 



