ORCHIDACR.E. (ORCHIS FAMILY.) 443 



I. ORCHIS. Anther-cells contiguous and parallel. Glands of the stigma, to which the bas 



of the stalks of the 2 pollen-masses cohere, contained in a common little pouch formed 



of a fold or hood of the stigma 



2 GYMNADEXIA. Author cells contiguous and parallel : glands naked. 

 jj. PLATANTHERA. Anther-cells diverging, widely separated at the base : glands naked, 



TRIBE II. IVEOTTIE^E. Anther dorsal (attached to the back of the column), erect, 

 parallel with the stigma j the 2 cells approximate. Pollen rather loose and powdery, or 

 elastically cohering 



4 GOODYERA. Lip entire, free from the column, strap-pointed. Pollen-masses elastic. 



5. SPIllANTIIES. Lip nearly entire, channelled, pointless, ascending, embracing the column. 



6. LISTEUA. Lip flat, spreading or pendulous, 2-lobed at the apex. 



TRIBE III. ARETHUSE^E, MAL.AXIDE.E, &c. Anther terminal (attached to 

 the apex of the column, or near it), and like a lid over the stigma, at length deciduous 

 * Pollen in loose or powdery grains, forming 2 or 4 delicate masses. 



7. ARETIIUSA. Lip bearded, its base adherent to the linear column. Pollen-masses 4. 



8 POGONIA Lip more or less crested, free from the club-shaped column. Pollen-masses 2. 

 0. CALOPOGON. Lip bearded, stalked, free : column winged at the apex. Pollen-masses 2 



* * Pollen in smooth and finally waxy masses, 

 i- Pollen-masses attached by elastic stalks, or in No. 10 sessile. 



10. CALYPSO. Lip inflated and sac-like, notched at the apex and 2-pointed underneath th 

 notch. Column winged and petal-like Pollen-masses 4. Stem 1-flowered. 



II. TIPULA1UA Lip short and flat, with a long and thread-like spur beneath. Column mar- 



gined. Pollen-masses 4. Raceme many-flowered. 

 12 BLETIA. Lip hooded, spurless. Column not margined. Pollen-masses 8. 



+- *- Pollen-masses without any stalks or connecting tissue 

 H. Plants green and with leaves. Sepals spreading : lip flat and spurleai 



13. MICROSTYLIS. Lip arrow-s':aped or heart-shaped. Column minute, round. 



14. LIl'ARIS. Lip entire, dilated. Column elongated, margined at the apex. 



* -M- Plants tawny or purplish, leafless, or with a root-leaf only : sepals and petals conniving. 

 16. CORALLOKHIZA. Lip with a spur or projection at the base adherent to the ovary. An- 

 ther-cells oblique. 



16. APLECTltUM. Lip spurless, free, raised on & claw. Anther rather lateral 



II. Anthers two. 



TBIBE IV. C YPRIPEDIEJE. The 2 anthers those of the lateral stamens : the third 

 or upper stamen (which is the one which bears the anther in the rest of the order) here 

 forming a petal -like sterile appendage to the column 



17. CYPRIPEDIUM. Lip a large and inflated sac, somewhat slipper-form. 



1. ORCHIS, L. ORCHIS. 



Flower ringent ; the sepals and petals nearly equal, all of them, or all but the 

 2 lower sepals, converging upwards and arching over the column. Lip turned 

 downwards, coalescing with the base of the column, spurred at the base under- 

 neath. Anther-cells contiguous and parallel. Pollen cohering in numerous 

 coarse waxy grains, which are collected on a cobweb-like elastic tissue into 2 

 large masses (one filling each anther-cell) borne on a slender stalk, the base of 

 which is attached to the 2 glands of the stigma, contained in a common littio 

 pouch or hooded fold. Flowers showy, in a spike. TOpx 1 ^ the ancient name.) 



1. O. spCt&l>flis, L. (SHOWY OPCHIS.) Root of thick fl^by fibre*, 



