87 



Leaves pubescent beneath astigmatic styles sessile, , , S. nervosa. 



Female Jlowers solitary, on a longer or shorter axillary peduncle. '^ 



Leaves 5-8 inch, long, very glossy and almost polished, , S. lucida. 



Leaves 3-4 inch, long, opaque on both sides, serrulate, S. cuspidata. 



SOLENOSTIGMA.-Ouly species, S. Wightii. 



CELTIS. 



Leaves tomentose, especially beneath, entire, fruiting peduncles solitary in the leaf 

 axils, C. mollis. 



Leaves glabrous, serrate; fruiting peduncles solitary or by 2-3 in the leaf axils, 

 simple, C. Hamiltonii. 



Leaves glabrous, remote serrulate ; fruiting peduncles forming a tomentose loose poor cyme 

 in the axils of the leaves, G. cinnamomea. 



ULMUS. 



* Perianth-segments deciduous, free to near the base. 



Leaves entire, fT". integrifolia. 



Perianth carnpanulate or turbinate-campanulate, marcescent-persistent. 



Leaves serrulate, JJ. laneifolia. 



JTJGLANDACEJE. 



Conspectus of genera. 



JcGLANS. Fmit a large dmpe with a fleshy pericarp. 



Engklhabdiia. Drupe small, diy, seated on the enlsirged wiiiglike-3-lobed bract. 



JUGLAHSi Only species with lacunose-wrinkled nuts, , . . , J. regia. 



ENGELHARDTIA. 



Leaves entire, without netvenation, glabrous ; base of female bracts hispid, E. spicata. 



Leaves serrate, with strong netvenation and pubescent beneath ; base of female bracts 



glabrous, , E. serrata. 



As former, but leaves entire E. acerijlora. 



SALICINE2E. 



Conspectus of genera. 

 Salu. Bracts of catkins entire. Torus gland-like. 



SAllXi Only species, S. tetrasperma. 



AMENTACE^. 

 Conspectus of genera. 



Ovary 1-celled with a solitary erect ovule. Fmit drupaceous, covered with resinous secretions. 

 HlBiCA. Male and female catkins sessile, erect. Scales of the male catkins broad, imbricate. Anther longer than 



the filaments. 



Ovary 2-celled, with a solitary suspended ovule in each cell. Nuts small, often winged, one-celled, 



combined with the scales in a sort of cone 

 BstULA. Scales of the male catkins stalked. Female catkins oylindi-ical, compact. Nuts not connate with the 



involucre. 

 Caepinus. Scales of the catkins sessile. Female catkins loose, spike-like. Bracts solitary, each in a 3-lobed leafy 



involucre. 



Ovary 3-9-celled, with 2 suspended ovules in each cell, most of the ovules abortive. Nuts solitary 



or several, rather large, bony or coriaceous, more or less enclosed in the enlarged wingless dry spiny, 

 scaly or smooth involucre, or the involucre reduced to a scaly or annular cup, in which the 

 solitary nut rests (acorns). 



QuZBCOS. Nuts solitary, resting on a scaled or lamellate-annular cup, exserted or at least with a circular opening 

 at the dpex of the cup. 



Castanza. Nuts solitary or by 2-3 wholly enclosed in the enlarged spiny or zonate involucre. 



