ORCIIIDACEAE. 53 



elongate niedian sepal. Lip elongate, the upper part of the narrow blade 

 crisped: callosities wanting. 



1. P. setacea Lindl. Plant 3-6 dm. tall: blades of the lower cauline leaves 

 oblong to elliptic, 4-10 em. long: lateral sepals linear-filiform, 15-17 mm. 

 long, exclusive of the spur: lip .iO-liT mm., the body narrowly elliptic or linear- 

 elliptic with a slender tip: capsules 14.-17 mm. long. — Hammocks. — {Bah., 

 Cuba, Ant.) 



7. STENORRHYNCHUS L. C. Rich. Caulescent brightly colored succu- 

 lent herbs. Leaves various, the basal with more or less elongate blades, early 

 decaying, upper cauline leaves mere sheathing scales. Flowers in a conspicu- 

 ous spike. Perianth reddish, yellowish, or white. Lateral sepals narrow, 

 united at the base and deeurrent as a spur which is adnate to the hypan- 

 thium. Petals shorter than the lateral sepals. Lip entire, scarcely as long as 

 the lateral sepals, the blade lanceolate, the claw ciliate, with thickened 

 margins, destitute of callosities. Stigma-beak subulate. 



1. S. orchioides (Sw.) L. C. Rich. Stem 3-7 dm. tall, stout: blades of the basal 

 leaves elongate, oblong to linear or broadest above or below the middle: spike 

 conspicuous; red or yellow: lateral sepals linear-lanceolate, 20-27 mm. long: 

 petals lanceolate, 15-20 mm. long, slightly curved: lip slightly shorter than 

 the lateral sepals, with a lanceolate body and a stout claw with lateral ridges 

 and cilia. — Hammocks. (Bah., Cuba, Ant.) 



8. IBIDIUM Salisb. Caulescent herbs. Leaves various, the basal and 

 lower cauline with usually narrow blades, the upper cauline leaves mere sheath- 

 ing scales. Spike spiral, compact. Perianth pale. Median sepal and petals 

 coherent: lateral sepals erect. Lip erect, or with a spreading tip, with 2 basal 

 callosities, the lower portion folded around the very short column. Stigma 

 with a 2-forked beak. [Gi/ro.stachys Pers.] — Ladies '-tresses. 



Flowers borne in a single rank : spike secund. 



Basal leaves short: blades wide: spike scarcely spiral. 1. I. lonr/ilahre. 



Basal leaves elongate ; blades very narrow : spike strongly 

 spiral. 

 Blades of the basal leaves flat: lip 7-ft mm. long. 2. I. larhiiatiim. 



Blades of the basal leaves channeled : lip 4-6 mm. long. 3. /. tortile. 



Flowers borne in several ranks: spike not secund. 4. I.ccrnuum. 



1. I. longilabre (Lindl.) House. Plants 2-4 dm. tall: basal leaves 2-5 cm. 

 long; blades lanceolate to oblong-lanceolate: median sepal 8-10 mm. long: 

 lip 7-8 mm. long, often with a very broad base. — Pinelands. 



2. I. laciniatum (Small) House. Plants 3-9 dm. tall: basal leaves mostly 

 10-40 cm. long; blades elongate-linear or slightly tapering to both ends: 

 median sepal 8-10 mm. long: lip 7-9 mm. long, much longer than wide, with 

 long slender callosities. — Everglades. 



3. I. tortile (Sw.) House. Plants 2-4.5 dm. tall: basal leaves 8-30 cm long; 

 blades elongate-linear, often rather slender: median sepal 5-6 mm. long: lip 

 mostly 4-6 mm. long, slightly longer than wide, with short, stout, callosities. — 

 Pinelands. — {Bah., Cuba, Ant.) 



4. L cemuum (L.) House. Plants 1..5-7 dm. tall: basal leaves 5-30 em. long; 

 blades linear to narrowly oblong, flat: median sepal 8-12 mm. long: lip mostly 

 8-11 mm. long, oblong or with a dilated base. [/. odoratum (Xutt.) House.] 

 — Everglades and along creeks. 



9. BEADLEA Small. Caulescent herbs. Leaves various, the basal and 

 lower cauline with wide blades, the upper cauline mere sheathing scales. 



