ORCHIDACE.E. (ORCHIS ^A-BIILT.) 443 



1. ORCHIS. Anther-cells contiguous and parallel. Glands of the stigma, to which the ban 



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. GYMNADENIA. Anther-cells contiguous and parallel : glands naked. 



a. PLATANTIIERA. Anther-cells diverging, widely separated at the base : glands naked. 



TRIBE II. NEOTTIEJE. Anther dorsal (attached to the back of the column), erect, 

 parallel with the stigma ; 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. 

 6. SPIRANTHES. Lip nearly entire, channelled, pointless, ascending, embracing the column. 



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



TRIBE IH. ARETHUSE^, MALAXIDEJE, &c. Anther terminal (attached to 

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

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



7. ARETHUSA. 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. 



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



* * Pollen in smooth and finally waxy masses. 

 f- 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. 



11. TIPULARIA. 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. 



f- - Pollen-masses without any stalks or connecting tissue. 

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



13. MICROSTYLIS. Lip arrow-shaped or heart-shaped. Column minute, round. 



14. LIPARIS. Lip entire, dilated. Column elongated, margined at the apex. 



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



15. CORALLORHIZA. Lip with a spur or projection at the base adherent to the ovary. An- 



ther-cells oblique. 



16. APLECTRUM. Lip spurless, free, raised on a claw. Anther rather lateral. 



II. Anthers two. 



TRIBE IV. C YPRIPEDIE JE. 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) her* 

 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 little 

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



1. O. SpecUibilis, L. (SHOWY ORCHIS.) Root of thick fleshy fibres, 



