OBCHIDACEAE 321 



less drooping, 2-lobed at the apex, the lobes sometimes elongated. Stigma-beak 

 rounded. [List era E. Br.] 



Lip wedge-shaped, about twice as long as the petals, notched at the apex: column 1.5 mm. long. 



1. O. Smallii. 

 Lip linear, 6-10 times longer than the petals, 2-parted: column 0.5 mm. long. 2. O. australis. 



1. Ophrys Smallii (Wiegand) House. Plant 1-3 dm. tall: blades of the bracts 

 reniform or ovate-reniform, 1-3 cm. long: sepals and petals 3.5-4 mm. long, acute or 

 acutish: lip 6-8 mm. long, the lobes rounded. 



In thickets, Pennsylvania to North Carolina and Tennessee. Spring and summer. 



2. Ophrys australis (Lindl.) House. Plant 1-3 dm. tall: blades of the bracts 

 ovate to triangular-ovate, 1.5-2.5 cm. long: sepals and petals 1.5-2 mm. long: lip 

 6-12 mm. long, the lobes acute. 



In wet soil, New York to Florida and Louisiana. Spring. 



23. CRANICHIS Sw. 



Caulescent succulent herbs, with coarse roots. Leaves various, the lower cauline 

 with mostly long-petioled dilated blades, the upper ones reduced to partially sheath- 

 ing scales. Flowers in a terminal spike. Perianth white or whitish. Lateral sepals 

 broad, slightly inequilateral. Petals narrow, much smaller than the sepals. Lip 

 longer than the petals, concave. 



1. Cranichis muscosa Sw. Plants 1-3 dm. tall, the stem scaly : leaf -blades 

 oblong-elliptic, oval or ovate, 2.5-7 cm. long: lateral sepals ovate, 3-3.5 mm. long: 

 petals narrowly elliptic to cuneate-spatulate, 2.5-3 mm. long: lip oblong or nearly so, 

 about 3 mm. long, sessile. 



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



24. PRESCOTTIA Lindl. 



Caulescent herbs, with stout roots. Leaves various, the basal ones with broad 

 blades, the cauline ones reduced to sheathing scales. Flowers in a terminal spike. 

 Perianth white, pink or greenish. Lateral sepals broad, nearly equilateral. Petals 

 much smaller than the sepals. Lip very broad, the blade auricled at the base. 



1. Prescottia oligantha (Sw.) Lindl. Plants 2-4 dm. tall, the stem with nar- 

 row scales: blades of the lower leaves ovate or oblong to oval, 2-6 cm. long: lateral 

 sepals ovate, about 1.5 mm. long: petals ovate to oblong-ovate, about 1 mm. long: 

 lip 1.2-1.5 mm. long, the blade suborbicular, with minute auricles at the base. 



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



25. PONTHIEVA E. Br. 



Caulescent herbs with scape-like stems from clustered roots. Leaves various, the 

 lower cauline with dilated blades, the upper mere scales. Flowers in a lax raceme. 

 Perianth greenish. Lateral sepals broad, slightly inequilateral. Petals drooping, the 

 blade very inequilateral, slender-clawed. Lip relatively small, concave, beaked, 

 short-clawed. 



Petal-blades about as wide as long: lip 4 mm. long or more. 1. P. racemosa. 



Petal-blades decidedly longer than wide: lip 3.5 mm. long or less. 2. P. Brittonae. 



1. Ponthieva racemosa (Walt.) C. Mohr. Plants 2-5 dm. tall, the stem scape- 

 like, with remote sheathing scales: leaves mainly near the base of the stem; blades 

 oblong or ovate-oval, 4-13 cm. long, or longer: raceme stout, glandular-pubescent, 

 6-21 cm. long: bracts linear-lanceolate, 5-14 mm. long: median sepal oblong or 

 oblong-lanceolate, 6-7 mm. long, obtuse; lateral sepals ovate, 5-5.5 mm. long, acutish: 

 petals 5-5.5 mm. long, the blades about as wide as long: lip 4-4.5 mm. long: anther 

 broadly linear. 



In open woods, North Carolina to Florida and Alabama. Also in tropical America. 

 Fall to spring. 



21 



