452 OX SEEDLINGS 



the unfolding of the cotyledons, glabrous, yellowish-green above, 

 pale beneath. 



Stem with very short internodes, terete, 2-3 mm. thick, shortly 

 pubescent at the base, densely so towards the apex, not very firm, 

 light green. 



Leaves simple, entire or nearly so, cauline, alternate, exstipulate, 

 sessile, coriaceous, densely hairy or villous, and excepting the mid- 

 rib with an indistinct venation. 



Primary ones sessile, 1-5 cm. long, 3 -10 mm. wide, scattered ; 

 first few small or aborted, acute, linear, entire with sunk midrib, 

 pubescent like the stem, bright green, with the lower ones hori- 

 zontal, the others twisted forty-five degrees or more from the plane 

 of the axis of leaf, which itself is at an angle of forty-five degrees to 

 the main axis. 



Roupala sp. (from Bogota). 



Hypocotyl erect, terete, glabrous, pale green, 7'5-10 mm. above 

 the soil. 



Cotyledons ovate-oblong, obtuse, or subacute, petiolate, with a 

 few alternate, much ascending nerves, finely pubescent, light green 

 above, paler beneath ; lamina 1-2-1-35 cm. long, 4'5-5'5 mm. wide ; 

 petiole wide, grooved above, convex on the back, dilated and connate 

 at the base, 2-5-3 mm. long. 



Stem erect, flexuose, pale green, coarsely hairy or subvillous, 

 ultimately woody ; 1st internode 1-5-2-5 mm. long ; 2nd 5-5-5 mm. ; 

 3rd 6-7-5 mm. ; 4th 3-8 mm. 



Leaves in the seedling stage simple, cauline, alternate, exstipu- 

 late, sessile or shortly petiolate, alternately and aseendingly penni- 

 nerved, hairy and scabrous on both surfaces, light green above, 

 paler beneath, and somewhat shining, decurrent on the petiole when 

 the latter is distinguishable ; petiole when present short, deeply 

 grooved or channelled above by the upturning of the edges, semi- 

 amplexicaul, or often almost surrounding the stem. 



No. 1. Obovate-cuneate, acutely serrate -dentate, with gland- 

 tipped teeth, shortly petiolate. 



No. 2. Similar, larger, wider, shortly petiolate. 



No. 3. Similar, much larger, decurrent almost or quite to the 



Nos. 4 and 5. Obovate-elliptic, much tapered to the base, 

 irregularly and obtusely dentate or almost crenate, with the teeth 

 tipped with an abruptly elongated gland or mucro. 



