ORCHIDACEAE. 55 



1. P. querciticola Lindl. Plant 1-3 dm. tall: leaf-blades lanceolate to ovate, 

 1-6 cm. long: lateral sepals 4-4.5 mm. long: petals 3.5-4 mm. long, narrower 

 than the sepals, inequilateral. Hammocks. F. K. (Bah., Cuba, Ant.) 



14. TBOPIDIA Lindl. Caulescent somewhat woody herbs with fibrous 

 roots. Leaves with plicate blades terminating long sheathing bases. Panicle 

 stalked. Perianth greenish-white. Lateral sepals nearly equilateral. Petals 

 somewhat smaller than the sepals, slightly curved. Lip shorter than the 

 petals, with a saccate base and a slightly curved blade. 



1. T. polystachya (Sw.) O. Ames. Stems 3-5 dm. tall, branched: leaf -blades 

 elliptic to elliptic-lanceolate, 5-20 cm. long, persistent: lateral sepals oblong 

 or nearly so, 6-7 mm. long: petals 5-6 mm. long: lip 4-4.5 mm. long, con- 

 stricted about the middle: capsules 9-11 mm. long. Hammocks. (Cuba, 

 Ant.) 



15. MALAXIS Soland. Terrestrial scapose herbs with corms. Leaves 

 mainly elongate sheaths, the upper one, or two, bearing a dilated blade at the 

 top. Eaceme erect. Perianth white or greenish. Lateral sepals slightly 

 equilateral. Petals linear-filiform or filiform, shorter than the sepals. Lip 

 broad, cordate at the base, sometimes lobed at the apex. Capsules spreading. 



1. M. floridana (Chapm.) Small. Leaves mostly 2; blades ovate to oblong- 

 ovate, 3-10 cm. long: scape 1-3 dm. tall: racemes stoutish: lateral sepals 

 oblong or nearly so, about 3 mm. long, obtuse: lip about 3.5 mm. long, 

 aurieled at the base, with a broad blunt tip: capsules 6-7 mm. long. Ham- 

 mocks. ADDER 'S-MOUTH. 



16. POLYSTACHYA Hook. Epiphytic herbs. Leaves several, approxi- 

 mate at the base of the flower-stem. Panicle often 1-sided. Perianth mainly 

 yellow. Lateral sepals broad, adnate to the long column-foot. Petals nar- 

 row. Lip dilated, 3-lobed, jointed to the column-foot, folded up against the 

 edges of the lateral sepals. Capsules nodding. 



1. P. minuta (Aubl.) Britton. Plants 1-6 dm. tall: blades of the lower 

 cauline leaves oblong to broadly linear, 1-3 dm. long: lateral sepals triangular, 

 5-6 mm. long, acute: petals spatulate or linear-euneate, 3-3.5 mm. long, 

 obtuse: lip 5-6 mm. long, the lateral lobes directed forward and nearly 

 equaling the broad middle lobe: capsules 9-11 mm. long. Hammocks. (Bah., 

 Cuba, Ant.) 



17. SPATHIGER Small. Epiphytic herbs with creeping stems and 

 branches. Leaves mostly ascending or spreading, with rather narrow blades, 

 and sheathing bases. Flowers in the axils of clasping bracts. Perianth small 

 and inconspicuous. Lateral sepals broad, often wider than the median one. 

 Petals rather broad, scarcely dilated upward. Lip concave; blade ovate, sub- 

 orbicular, or reniform. Column short, wholly adnate to the lip. Capsule erect. 



1. S. rigidus (Jacq.) Small. Plants with creeping stem and branches 1-5 

 dm. long: leaf -blades oblong, sometimes narrowly so, 4-8 cm. long: perianth 

 greenish: lateral sepals ovate or oblong-ovate, 5-7 mm. long: petals broadly 

 linear to oblong-spatulate : lip green; blade 2-3 mm. long, triangular-reni- 

 form to suborbicular, bearing callosities near the base: capsules 15-18 mm. 

 long. [Epidendrum rigidum Jacq.] Hammocks. (Bah., Cuba, Ant.) 



18. AULIZA Salisb. Epiphytic herbs with erect or ascending, often 

 tufted, stems. Leaves ascending or spreading, with broad or narrow blades, 



