SIMARUBE/E 327 



Cneorum tricoccum are sessile, linear, one-nerved, and sub- 

 coriaceous. The primary leaves are lanceolate-elliptic or 

 oblong, obscurely penninerved, and entire, as they are in the 

 adult state. 



The cotyledons of Ailanthus glandulosa are also aerial, 

 foliaceous, obovate, and shortly petiolate. The first two leaves 

 are pinnately trifoliolate, and remind one of those of Ehus 

 typhinus. Young trees are vigorous ; the leaves vary from 

 eighteen inches to three feet in length, with numerous pairs of 

 leaflets. 



Ailanthus glandulosa, Desf. 



Fruit consisting of one to five samaras comparable to those of 

 Fraxinus. Samaras indehiscent, thin or membranous, strongly 

 winged, oblong or oblanceolate, obtuse, tapering downwards and sud- 

 denly narrowed to the receptacle on the dorsal edge at the base, 

 notched on the ventral aspect close to the attachment of the seed, and 

 elevated into a hemispherical swelling where the latter is situated. 



Seed obovate, biconvex, flattened, conforming to the cavity pretty 

 closely when fresh, but shrinking considerably when dry, pale 

 whitish, descending obliquely ; hilum a little below the pointed 

 upper end, and on the ventral edge of the seed ; raphe ventral ; 

 chalaza pale brown at the lower and broader end of the seed ; testa 

 thin, membranous. 



Endosperm moderately copious, fleshy, surrounding the embryo. 



Embryo straight, colourless, large, almost as long as the endo- 

 sperm. 



Cotyledons broadly obovate, slightly auricled at the base so as to 

 accommodate the radicle ; the latter stout, obtuse, several times 

 shorter than the cotyledons, embedded in endosperm close to the 

 pointed end of the seed, and consequently a little above the hilum. 



A. glandulosa, var. rubra. 



Hypocotyl erect, terete, glabrous, 2'3-3 cm. long, light green or 

 colourless. 



Cotyledons coriaceous, broadly obovate, obtuse, entire, shortly 

 petiolate, glabrous, light green, distinctly and alternately pinnati- 

 nerved. 



Stem erect, herbaceous, ultimately woody, slightly flattened, 

 covered with fine hairs, light green ; 1st internode 5-8 mm. long. 



First leaves compound, trifoliolate, petiolate, exstipulate ; ter- 



