ORCHIDACE^. (oUCniS FAMILY.) 453 



• • Stems Eheatbed. 



3. CORALLORHTZA. Spur of the lip short and adoate to tho ovary. Hoot branching, 



toothed. 



4. APLECTKL'.M. Lip spurless. Root of two solid connected tubers, bearing a single leaf. 



Tribe I L EPIDENDRE^. — Pollen in smooth waxy masses connected by elastic 

 tissue. 



5. EPIDENDRUM. Pollen-masses 4. Claw of tho spurless lip adnate to tho column. 



6. TIPULARIA. Pollen-masses 4. Lip free, spurred. Stem sheathed. 



7. BLETLA. Pollen -maiiscs 8. Lip free, hooded, spurless. 



Tribe III. ARETHUSEiE. — Pollen in loose powdery masses. Lip crested. 



8. CALOPOGOX. Pollen-masses 2. bipartible. Column incurved, winged at the apex. 



9. POGONIA. Pollen-masses 2. Column wingless, club-shaped. 



10. ARETIIUSA. Pollen-masses 4. Column petal-like. Root a solid tuber. 



n. Anther solitary, adnate to the column, erect, persistent. 

 Tribe IV. OPHRYDEjE. — Anther adnate to the apex of the column, thfe cells sep- 

 arate. Pollen cohering in numberless waxy grains, which are collected by elastic tissue 

 into a large mass, and attached to a gland of the stigma by an elastic stalk. Lip spurred. 



11. ORCinS. Anther-cells contiguous, parallel. Glands of the stigma covered with a common 



hood-like fold of the stigma. 



12. QYMNADENIA. Anther-cells contiguous, parallel. Glands of the stigma naked. 



13. PLATANTIIERA. Anther-cells diverging from the base. Glands of tho stigma naked. 

 14- HABEN.\KIA. Anther-cells diverging. Glands naked. Throat of the stigma furnished 



with variously shaped appendages. 



Tribe V. NEOTTIEiE. —Anther attached to the back of the column, parallel with 

 the stigma ; the cells approximate. Pollen powdery. 



# Pollen-masses 2. 



15 SPTRANTHES. Lip nearly entire, clasping the column, obtuse. 



16. GOODYERA. Lip sessile, entire, contracted above the middle, slender-pointed. 



17. LISTERA. Lip 2-cleft. Stem with a pair of ovate opposite leaves. 



* * Pollen-masses 4. 



18. PONTHIEVA. Claws of the petals and Up adnate to the column. 



III. Anthers two, fixed beneath the lateral lobes of the column. 

 Tribe VT. CYPRIPEDIEiE. —Column appendaged by the petal-like sterile stamen. 



19. CTPRIPEDIUM. Lip large, inflated. Leaves large, plaited. 



1. MICROSTYLIS, Nutt. Adder's-Modth. 



Sepals oblong, spreading. Petals filiform. Lip cordate or sagittate, entire or 

 nearly so, sessile. Column minute, 2-toothed at the apex. Antiier lid-like. 

 Pollen-masses 4, collateral, united by pairs at the apex. — Low herbs, from 

 bulbous roots. Stem 1 - 2-leaved, sheathed below. Flowers racemed or spiked, 

 minute, greenish. 



1. M. ophioglossoides, Nutt. Leaf solitaiy near the middle of the 

 5-angled stem, ovate, clasping; raceme short, with the unexpanded flowers 

 crowded in a globular head, elongated in fruit ; pedicels slender, much longer 

 than the flowers ; lip auricled at the base, 3-toothed at the apex. (Malaxis ophi- 

 oglossoides, MiihL) — Low shady woods, Florida, and northward. July and 

 Aug. — Stem 4' - 8' high. Leaf 1 ' - 2' long. Flowers A" wide. 



