The Flora of the Cayuga Lake Basin 165 



b. Stigma sessile or subsessile (style less than 0.5 mm. long or lacking) ; nectary 

 yellow or greenish. 

 c. Ovary and capsule sessile or subsessile, glabrous ; young leaves pubescent ; 

 trees. 

 d. Catkins 1.5-2 (2.5) cm. long, recurved; mature capsule 1-1.5 mm. long; 



twigs very slender, drooping. 6. 5". blanda 



d. Catkins (1.5) 2-6 cm. long, not recurved; mature capsule 2.5-4 mm. long; 

 twigs stouter, sometimes flexuous but not drooping. 

 e. Twigs green or brownish green. 8. S. alba 



e. Twigs yellow or reddish yellow, flexuous. 8a. S. a., var. vitellina 



c. Ovary and capsule distinctly pedicelled. 



d. Ovary and capsule glabrous ; leaves lanceolate, petioled, closely serrate ; twigs 



fragile near base ; trees. 1. 5". nigra 



d. Ovary and capsule villous, the capsule sometimes glabrous in age; leaves 

 linear, sessile or subsessile, distinctly serrate ; twigs tough at base ; low 

 shrubs. 5. S. longifolia 



b. Style distinct, 0.5-1 mm. long; ovary and capsule glabrous, pedicelled. 



c. Catkins slender, 4-7 mm. in diam. at flowering time, 1-1.8 cm. in diam. in fruit; 

 twigs fragile at base ; trees. 

 d. Nectary red, blackish when dry ; capsule globose-conical, 4-4.5 mm. long ; 

 catkins very loose in fruit; one-year-old twigs very slender, 1-2.5 (3) mm. 

 in diam. 2. S. amy gdalo ides 



d. Nectary greenish, pale when dry ; capsule subulate-conical, 5-6 mm. long ; 

 catkins not extremely loose in fruit; one-year-old twigs stouter, (2.5) 3-4 

 mm. in diam. 7. 5". fragilis 



c. Catkins stout, 8-14 mm. in diam. at flowering time, 2-2.5 cm. in diam. in fruit ; 

 twigs tough at base ; nectaries greenish ; shrubs. 

 d. Ovary and capsule rather abruptly contracted above the subovoid base ; 

 mature capsule 5-6.5 mm. long; plant in flower May 15-30, in fruit June- 

 July. 3. S. lucida 

 d. Ovary and capsule subulate-conical, tapering uniformly from near the base; 

 mature capsule 7-9 mm. long ; plant in flower June 10-30, in fruit Aug.-Oct. 



4. S. serissima 

 a. Scales with pinkish, reddish, brownish, or black tips, not uniformly yellow or pale 

 except sometimes in nos. 9 and 10, chiefly persistent ; catkins on leafy shoots or 

 nearly sessile ; style present or wanting ; shrubs. 

 b. Ovary and capsule glabrous, pedicelled. 



c. Scales pale ; catkin-bearing branchlets leafy, 0.5-3 cm. long below the catkins ; 



leaves bluish, acute or rarely obtuse. 9. S. pedicellaris 



c. Scales black-tipped ; catkins sessile or nearly so, subtended by a few leafy 

 bracts; leaves green, acute or acuminate. 11. S. cor data 



b. Ovary and capsule hairy. 



c. Ovary 2 mm. long or more, distinctly pedicelled; capsule 3.5-15 mm. long; 

 young foliage pubescent; leaves and catkins strictly alternate. 

 d. Catkins with some herbaceous bracts at the base, in flower as the leaf buds 

 are opening. 

 e. Scales pale or pink-tipped, oblong or spatulate. 10. 6\ Bebbiana 

 e. Scales dark-tipped, oblanceolate or obovate. 

 /. Style deep red, 1-1.5 mm. long; nectary deep red; ovary and capsule 



white-woolly. 12. .S". Candida 



f. Style pale, very short or even lacking ; nectary pale or yellow ; ovary 

 and capsule silky or strigose (rarely glabrate). 

 g. Capsule pointed; catkins 10-15 mm. long; pedicel in fruit 1.5-3 mm. 



long. 13. 5". petiolaris 



g. Capsule very blunt; catkins 18-30 mm. long; pedicel in fruit 0.7-1.3 

 (1.8) mm. long. 14. S. sericea 



