52 OBCHIDACEAE. 



1. H. Oarberl (Porter) Small. Stems 3-6 dm. tall: leaf -blades oblong to 

 oblong- lanceolate, 6-10 cm. long: lateral sepals very broad, 5.5-6.5 mm. long: 

 petals about 4 mm. long, sinuately 3-lobed at the apex: lip 6-10 mm. long, 

 broadlv linear, obtuse: spur 12-18 mm. long: capsule-body 10-15 mm. long. 

 Hammocks. F. K. (Cuba.) 



3. GYMNADENIOPSIS Bydb. Caulescent herbs. Spike erect. Peri- 

 anth white, greenish, pink, or orange-yellow. Sepals distinct, the lateral ones 

 slightly inequilateral. Petals mostly smaller than the sepals, undulate, sinuate- 

 lobed or erose. Lip entire or 3-lobed at the apex, or crenulate or erose. 

 Anther-sacs parallel, approximate, the glands naked, contiguous. Stigma 

 with 2 or 3 appendages at the beak. 



1. O. Integra (Nutt.) Bydb. Stems 2-5 dm. tall: leaves reduced on the upper 

 part of the stem, the lower ones with linear or linear-oblong blades 5-20 cm. 

 long: perianth white or pink: lateral sepals ovate or oblong-ovate, 4-6 nun. 

 long, curved, the tip oblique: lip linear or linear-lanceolate, 6-7 mm. long, 

 entire; spur about 1 cm. long. Everglades. 



4. CAKTERIA Small. Caulescent herbs with clustered fleshy tubers. 

 Leaves various, the basal ones with firm narrow plicate blades, the cauline 

 mere sheathing scales. Flowers erect, several, axillary to scale-like bracts. 

 Perianth colored. Sepals nearly equal, longer than the petals. Petals de- 

 cidedly narrower than the sepals. Lip short, sessile, slightly 3-lobed at the 

 apex, with 5 longitudinal crests. Capsules erect. 



1. C. corallicola Small. Stems 2-3.5 dm. tall: basal leaves 2-7 cm. long; 

 blades nearly linear, narrowed at both ends: flowers erect: lateral sepals 

 linear-lanceolate to broadly linear, 6.5-7.5 mm. long: lip oval to orbicular- 

 oval, 6-7 mm. long, the middle lobe much larger than the lateral ones: .:q> 

 sules not seen mature. Pinelands. (Bah.). 



5. VANILLA Mill. Succulent vines with aerial roots. Leaves remote, 

 often much reduced. Flowers in axillary clusters or spikes. Perianth mainly 

 pale, but showy. Lateral sepals narrow, slightly broadened upward. Pi-tals 

 slightly shorter than the sepals. Lip cornucopia-like, involute and adnate to 

 the long column, the free dilated tip fringed or lobed. Capsule elongate. 

 VANILLA. 



Lip notched at the apex: leave* obsolete. 1. V. articulata. 



Lip abruptly pointed at the apex : leave* mere narrow scale*. 



1. V. articulata Northrop. Stem and branches very stout: leaves obsolete: 

 lateral sepals narrowly oblong, 28-33 mm. long: petals oblong-spatulate: lip 

 28-32 mm. long, the edge undulate-crisped: capsules 7-9 cm. long, stout- 

 clavate. Hammocks. ( Bah. ) 



2. V. Eggersii Bolfe. Stem and branches rather slender: leaf-blades lin<>ar 

 to lanceolate, often partially scale-like, 5-7 cm. long: lateral sepals spatulate 

 33-36 mm. long: petals narrowly spatulate: lip 30-36 mm. long, abruptly 



Einted, the edges crisped: capsules clavate, 5-7 cm. long, slender-clavate. 

 unmocks. (Bah., Cuba.) 



6. PELEXIA Poit Caulescent herbs with scape-like stems. Leaves 

 various, the lower cauline with dilated long-petioled blades, the upper cauline 

 mere sheathing scale*. Flowers in a spike. Perianth greenish. Lateral sepals 

 united at the base and produced into a spur. Petals adnate to the narrow 



