346 



OX SEEDLINGS 



due to the form of the seed and the way they are bent 

 in conformity \vith it. Colletia cornuta (fig. 246) differs 

 chiefly in the cotyledons being suborbicular and rounded at 

 the apex. 



Ehamnus davuricus, Pall. (fig. 245). 



Hypocotyl erect, terete, rather short, soon becoming brown and 

 woody, 12-18 mm. above the soil. 



Cotyledons broader than long, almost obreniform, with a broad 

 shallow apical sinus, suddenly cuneate at the base, five-nerved, the 

 middle nerve bifurcate some distance below the apex, and the lateral 

 ones much branched laterally and incurved at the apex, where they 

 unite with the middle one, enclosing an obcordate space, the basal 

 ones short and slender, uniting upwards with the lateral branches 

 of the last two, glabrous, much reticulated, as seen when examined 

 by transmitted light, shining on both surfaces, deep green above, 

 ler beneath; lamina 10-12 mm. long, 14-16 mm. wide ; petiole 

 semiterete, flattened above, 3-4 mm. 

 long. 



Stem erect, terete, glabrous, 

 green, soon becoming brown and 

 striated or reticulated by splitting of 

 the bark, woody ; 1st internode about 

 15-16 mm. long ; 2nd 4-6 mm. ; 3rd 

 18-20 mm. 



Leaves simple, cauline, alternate, 

 stipulate, petiolate, alternately in- 

 curvinerved, subcoriaceous, shining 

 on both surfaces, deep green above, 

 paler beneath, and closely reticulated, 

 glabrous, or glandular-pubescent at 

 the margin when young ; petiole 

 short, semiterete, flattened above ; stipules slender, subulate, acu- 

 minate, pale green, seated on the junction of petiole and stem, soon 

 becoming brown, deciduous. 



Nos. 1 and 2. Oblong-lanceolate, shallowly and distantly serrate 

 with intermediate minute serratures or sets. 



Nos. 3 and 4. Oblong, otherwise similar, but larger. 



Nos. 5-9. Oblanceolate-oblong, acuminate, tapering at the base. 



Colletia cornuta (fig. 246). 



Hypocotyl erect, terete, glabrous, 10-14 mm. long, green, almost 

 colourless near the soil. 



FIG. 246. Colletia cornuta, x 2. 



