DIDYNAM1A ANG10SPERMIA. 
135 
] 1. Americana. 
O. caule simplicis- 
simo, squamis ovato- 
lanceolatis, imbricatis, 
obtecto ; spica terrni- 
naii, glabra; corollis 
recurvatis; staminibus 
exertis. 
Stem very simple, 
covered with ovate- 
lanceolate, imbricate 
scales; spike terminal, 
glabrous ; corolla re- 
curved; stamens ex- 
serted. 
Sp. pi. 3. p. 351. Walt. p. 166. Mich. 2. p. 26. Pursh 2. p. 431. 
Nutt. 2. p. 58. 
Root perennial, somewhat tuberous, parasitic ? Stems clustered, forming 
compact patches, 1 — 2 feet in diameter, simple, carnose, clothed with 
long ovate scales, tapering towards the summit, of a pale brown colour. 
Flowers in a terminal spike, one or more from each bud, covered and pro- 
tected by the scales of the stem. Calyx 5 ? parted unequally, with 2 
small bracteal leaves at base. Corolla slightly incurved, 5 lobed, nearly 
white, a little longer than the calyx. Style nearly as long as the corolla. 
Stigma capitate. 
Grows in rich shaded soils. 
Flowers March — April. 
2. Uniflora. 
O? scapis nudis u- 
nifloris ; calyce ebrac- 
teato ; corolla recur- 
vata. 
Scapes naked, one 
flowered ; calyx with- 
out bractea ; corolla 
recurved. 
Sp. pi. 3. p. 352. Walt. p. 166. Mich. 2. p. 26. Pursh 2. p. 431. 
O. Biflora. Nutt. 2. p. 59* 
Root perennial, somewhat tuberous, parasitic. Stems very short, nume- 
rous from each root, covered with scales, bearing one or two flowers near 
the summit. Flower's in my specimens invariably solitary, on naked, pu- 
bescent scapes, 2 — 4 inches long. Calyx somewhat campanulate, deeply 
5-cleft, pubescent. Corolla S times as long as the calyx, slightly curved, 
of a yellowish white colour, with deeper veins, border 5-cleft, segments 
oval, edged with a very fine blue fringe. Stamens and Style much short- 
er than the corolla. (Anthers obcordate with the filaments smooth. Stig- 
ma bilammellate, perforated, lobes rounded and acuminate, the lower lobe 
arched over the stamens. Nutt.) 
Grows in the pine barrens of the middle country of Carolina. Dr. 
Macbride. 
Flowers April. 
