330 OECHIDACEAE 



1. lonopsis utricularioides Lindl. Plant 1.5-6 dm. tall: blades of the lower 

 cauline leaves linear or nearly so, 5-16 cm. long, very thick: panicle many-flowered: 

 lateral sepals lanceolate, 5-6 mm. long: petals oblong, 6-7 mm. long: lip 11-13 mm. 

 long, the middle lobe nearly as wide: capsules 2-3 cm. long, beaked. 



In hammocks, southern peninsular Florida. Also in the West Indies. 



46. ONCIDIUM Sw. 



Epiphytic or sometimes terrestrial herbs, with pseudobulbs. Leaves with broad 

 or narrow and elongated blades, terminating the pseudobulb, from the base of which 

 arises the flower-stalk. Flowers in a raceme or panicle. Perianth often mottled. 

 Lateral sepals slightly inequilateral, reflexed or spreading. Petals often quite similar 

 to the sepals. Lip crested, clawless or short-clawed, 3-lobed, the middle lobe larger 

 than the lateral ones. 



Leaf-blades flat: lateral sepals separate. ■ 



Epiphytic: middle lobe of the lip 20-25 mm. wide: leaf-blades not elongated. 1. O. gultatum. 



Terrestrial: middle lobe of the lip 11-13 mm. wide: leaf-blades elongated. 2. O. sphace.latum. 



Leaf-blades equitant, the faces united: lateral sepals coherent. 3. O. variegatum. 



1. Oncidium guttatum (L.) Reichenb. f. Pseudobulbs 1-2 cm. long: leaf- 

 blades oblong, elliptic or oblong-lanceolate, 3-6 dm. long: flower-stalk, 12-19 dm, 

 long: lateral sepals 16-19 mm. long, the blades oval or obovate, crisped: petals 15-18 

 mm. long, the blade obovate to cuneate: lip 18-20 mm. long, the middle lobe 20-25 

 mm. wide. 



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



2. Oncidium sphacelatum Lindl. Pseudobulbs 8-11 cm. long: leaf -blades linear, 

 3-9.5 dm. long: flower-stalk 9-21 dm. long: lateral sepals 15-16 mm. long, the blade 

 oblong-lanceolate: petals 14-15 mm. long, the blade ovate-lanceolate: lip 13-15 mm. 

 long, the middle lobe 11-13 mm. wide. 



In pine lands and hammocks, southern peninsular Florida. Also in tropical America. 



3. Onciditim variegatum (Sw.) "Willd. Leaf -blades 3-7 cm. long, 2-keeled above: 

 flower-stalk 1-3 dm. tall: lateral sepals about 6 mm. long, the blades spatulate: 

 petals about 8 mm. long, the blades orbicular: lip 10-12 mm. long, the middle lobe 

 15-21 mm. wide. 



In hammocks, near Palm Beach, Florida. Also in tropical America. 



47. POLYRRHIZA Pfitz. 

 Epiphytic herbs with dense cluster of roots. Leaves scale-like or obsolete. 

 Flowers solitary or few terminating the short scape. Perianth often white. Lateral 

 sepals curved. Petals nearly like the sepals or broader. Lip sessile, 3-lobed, the 

 middle lobe again 3-lobed, the lateral lobes angular: spur elongated. Capsule linear- 

 cylindric. 



1. Polyrrhiza Lindfenii (Benth.) Eolfe. Stems 4-12 cm. long, scaly: perianth 

 conspicuous: lateral sepals linear or linear-lanceolate, 2.5-5 cm. long: lip 3-5 cm. 

 long, the middle lobe with 2 linear-lanceolate spreading segments 5-10 cm. long; 

 spur 10-15 em. long. 



On palms, southern peninsular Florida. Also in Cuba. 



48. CAMPYLOCENTRUM Benth. 

 Epiphytic herbs consisting chiefly of roots. Leaves with thick blades or mere 

 minute scales. Flowers borne in a stiff spike. Perianth minute or inconspicuous. 

 Lateral sepals nearly equilateral. Petals similar to the lateral sepals, but smaller, 

 usually narrow. Lip partially adnate to the column-foot, usually saccate at the base. 

 Capsule sessile. 



