286 



THE FLORA. 



Fig. 646. Lady's-sljpper {Cypripedium acaule), whole plant, with its 2 leaves, scape, and 

 curious flower. 7. Plan of the flower; s, sepals (outer circle), the 2 lower united ; p, the petals; 

 i, lip (lower petal) ; e, the anthers, upper one sterile ; o, the 3-celied ovary. 8. The column seen 

 roin beneath, with the pistil, two stamens, and the leaf-like sterile one. 9. Flower and bract of 

 >chis spectabilis. Fig. &bO. Its 2 pollen masses exhibited (enlarged). 1. Arethusa bulbosa; ^/J 

 he flower. 2. Its column enlarged, with its lid-like anther opening, showing its pollen-masses 

 >eneath. 



b Fls. in the axils of bracts. Pollen masses 2. Lvs. l-oo . Orchis. Orchis. 2 

 b Flowers bractless. Pollen masses 4. Leaf 1 only. Tipula. Tipula'ria. 



s Root coniline. Spur growing to the ovary. Lvs. none. Coral-root. Corallorhi''za. 3 



c Root 2 corms. Spnrnone. Leaf 1, late, radical. Putty-root. Kvlkctrv.^. 



d Flowers 1 only, rose-purple. Lip bearded. Arethusa. Arethc'sa. 4 



d Fls. racemed, dark-purple, beardless. (Lvs. or few.) BUtia. Bletia. 



e Leaf 1. Lip sagittate. Column minute. Micros' tylis. Micros 'tylis. 



e Leaves 2, radical. Lip fiat, ascending. Column winged. Liparls, Lip''ari8. 



e Leaves 2, cauline. Lip pendulous, 2-lobed or 2-cleft. Ttcay-hlnde. Listetba 



