232 ON SEEDLINGS 



sunk midrib, shortly petiolate, about 2 cm. long, and 1'5 cm. wide, 

 succulent, purplish on both surfaces. 



Second pair ovate, acuminate, with short, broad petioles, differ- 

 ing also from the first in the undulated margin and the silvery 

 nerves and veins. 



Third and subsequent pairs more lanceolate-ovate and much 

 larger ; fourth pair about 3'5 cm. long and 1'5 cm. wide. 



Stapelia variegata, L. (fig. 522). 



Hypocotyl erect, clavate, succulent, compressed the opposite 

 way to the cotyledons, glabrous, pale subglaucous-green, 1*7 cm. 

 above the soil. 



Cotyledons ovate, obtuse, twisted obliquely 

 and each facing an opposite way, ascending, 

 coloured like the petiole, 3*5 mm. long, 2*5 

 mm. wide, sessile, persistent. 



Stem succulent, erect, obtusely quadrangular 

 by the decurrent bases of the leaves, glabrous , 

 coloured like the hypocotyl ; 1st internode 

 6 mm. long ; 2nd 4 mm. ; 3rd 3'5 mm. 



Leaves succulent, simple, entire, small, 

 cauline, opposite, decussate, exstipulate, ses- 

 sile, coloured like the stem, shortly conical, 



PIG. 522. acute, decurrent at the base, forming angles on 



Stapelia vanegata. . , . r 



Nat. size. the stem, horizontal, To-1/75 mm. long. 



Stapelia bufonia, Jacq. 



Seeds ovate or oval in outline, surrounded by a corky rim, 

 germinating in three or four days. 



Primary root tapering, abundantly covered with root-hairs, 

 colourless, rather stout. 



Hypocotyl as in S. vanegata, 2-05 cm. long, 3 mm. wide on 

 the flattened faces, and 2 mm. on the narrow. 



Cotyledons ovate, obtuse, sessile, plano-convex, and applied to 

 each other obliquely in the seed by their flattened faces, which 

 afterwards remain in an oblique position, each facing a different 

 direction, 3 mm. long, 1-5 mm. wide, persistent. 



Stapelia mutabilis, Jacq. 



Hypocotyl as in S. variegata, T15 cm. above the soil. 



Cotyledons as in S. bufonia, horizontal or placed obliquely, each 

 facing a different way, pale subglaucous-green faintly mottled with 

 paler markings, 2 mm. long, 1-25 mm. wide. 



Stem as in S. variegata, ' pale glaucous-green mottled with 



