OECHIDACEAE 329 



yellowish green : lateral sepals oval or obovate, 14-16 mm. long : petals oblong, 18-21 

 mm. long: lip butterfly -like, 21-24 mm. wide, the middle lobe reniform, with a beaded 

 margin, the lateral lobes larger than the middle one : capsule-body 6-10 cm. long. 

 In hammocks, southern peninsular Florida. Also in tropical America. 



42. TRIORCHOS Small & Nash. 



Caulescent herbs with corms. Leaves several, arising from the corm before the 

 lateral flower-stalk. Flowers in a terminal raceme with elongated bracts. Perianth 

 mainly brown. Lateral sepals curved, slightly adnate to the column-foot. Petals 

 nearly equilateral, shorter than the lateral sepals. Lip fully as wide as long, crestless, 

 3-lobed, the lateral lobes spreading. Capsules erect. 



1. Triorchos ecristatus (Fernald) Small. Leaf -blades linear to narrowly linear- 

 elliptic, 2-5 dm. long: flower-stalk virgate, 4-21 dm. tall: lateral sepals oblong to 

 oblong-lanceolate, 8^9 mm. long: petals usually elliptic-lanceolate, 7-8 mm. long: 

 lip 7-8 mm. long, the middle lobe much longer than the lateral lobes: capsules oval, 

 about 2 cm. long. 



In pine lands, peninsular Florida. Also in Cuba. 



43. PLATYPUS Small & Nash. 



Caulescent herbs with corms. Leaves several from the top of the corm per- 

 sisting until the lateral flower-stalk arises. Flowers in a terminal raceme with small 

 bracts. Perianth mainly brown and purple. Lateral sepals slightly dilated upward, 

 broader than the median one, decurrent to the base of the forked column-foot. 

 Petals shorter than the lateral sepals, less decurrent. Lip concave at the base, 

 papillose-crested, shallowly 3-lobed, the middle lobe drooping. Capsules mostly 

 drooping. 



1. Platypus altus (L.) Small. Leaf -blades narrowly linear-elliptic to almost 

 linear, 2-5 dm. long: flower-stalk 5-12 dm. tall: lateral sepals oblong or nearly 

 middle lobe spreading, 810 mm. wide, papillose-crested. [Limodorum altum L. P. 

 papilliferous Small & Nash.] 



In the Everglades, Florida. Also in the West Indies. 



44. MACRADENIA E. Br. 



Epiphytic caulescent herbs, with pseudobulbs. Leaves terminating the pseudo- 

 bulbs from the base of which arise the drooping flower-stalk. Flowers in lax racemes. 

 Perianth mainly yellowish. Lateral sepals slightly inequilateral. Petals nearly like 

 the lateral sepals, slightly smaller. Lip sessile, with 2 broad basal lobes and 1 narrow 

 middle lobe. 



1. Macradenia Iut6scena R. Br. Pseudobulbs 2-4 cm. long: leaf -blades broadly 

 linear to oblong-linear, 8-16 cm. long: flower-stalk mostly shorter than the leaves, 

 drooping: perianth yellowish: lateral sepals elliptic-lanceolate, 8-9.5 mm. long: lip 

 8-10 mm. long, the lateral lobes forming a reniform body terminated with the linear- 

 lanceolate middle lobe. 



In hammocks, Royal Palm Hammock, southern peninsular Florida Also in tropical 

 America. 



45. IONOPSIS H.B.K. 



Epiphytic caulescent herbs. Leaves approximate at the base of the terminal 

 flower-stalk. Flowers in a terminal panicle. Perianth mainly white pink or lavender. 

 Lateral sepals united at the base and produced into a short spur. Petals larger than 

 the lateral sepals. Lip relatively large, with 2 small lateral lobes and a dilated 

 notched middle lobe with 2 tubercles at its base. Capsules drooping. 



