CONVOLVULACE^E 



289 



Capsule few-seeded. 



Seed variously angled and shaped, rather compressed laterally, 

 3-3' 5 mm. in diameter ; testa slightly rugose, thick, almost corky ; 

 hilum rather conspicuous. 



Endosperm fleshy, copious, white. 



Embryo curved or rounded on itself, embedded in endosperm ; 

 cotyledons long, linear, circinately curved, 

 obtuse, plano-convex, lying the narrow way 

 of the seed with their faces to the axis, not 

 much wider than the radicle ; radicle ob- 

 tuse, terete, incumbent on and about as 

 long as the cotyledons. 



Nolana atriplicifolia var. subcasrulea 

 (fig. 543). 



Primary root long, tapering downwards, 

 stout, with slender lateral rootlets. 



Hypocotyl very short, suddenly tapered 

 into and indistinguishable from the root, 

 colourless. 



Cotyledons lanceolate-oblong, obtuse, 

 with a very indistinct midrib, flattened 

 above and convex beneath, fleshy, tapered 

 to a short petiole, glabrous, light opaque 

 green, fading to yellow with age ; lamina 

 7'5-lO5 mm. long, 2'5-3'25 mm. wide ; 

 petiole *5-l mm. long, connate at the base 

 round the plumule. 



Stem developed when about to flower ; 

 primary internodes undeveloped. 



Leaves simple, entire, radical and cauline, alternate, exstipulate, 

 petiolate, fleshy, flat or convex above, glabrous except towards base of 

 the petiole, indistinctly alternately incurvinerved, venation best seen 

 on the under side of young leaves, light yellowish-green above, paler 

 beneath ; petioles semiterete, channelled or shallowly grooved above, 

 dilated towards the base and thinly hairy. 



Nos. 1 and 2. Ovate, obtuse, somewhat convex above. 



Nos. 2-5 inclusive. Subelliptic, obtuse, flattened above or slightly 



FIG. 543. Nolana atri- 

 plicifolia var. subccerulea. 

 Nat. size. 



Nolana sp. 



Hypocotyl erect, terete, glandular-pubescent, pale green, 1-5- 

 2 cm. long. 



II. U 



