COMPOSITE 161 



Cotyledons spathulate-obovate, obtuse, slightly emarginate, 

 glabrous, light green, indistinctly trinerved. 



Stem with the primary internodes undeveloped. 



First leaves simple, cauline, alternate, or in some plants the 

 first pair are opposite, dentate, oblong-obovate, obtuse, petiolate, 

 glabrous, light green, reticulate. 



Tragopogon crocifolium, L. 



Hypocotyl erect, terete, glabrous, 8-10 mm. long, tinged with 

 red. 



Cotyledons long, linear, acute, clasping the stem, sessile, gla- 

 brous, light green, one-nerved like the first leaves. 



Stem with primary internodes undeveloped. 



First leaves simple, entire, radical, alternate, linear, narrow, 

 acute, light green, glabrous, one-nerved. 



STYLIDIEJE. 



Benth. et Hook. Gen. PL ii. 534. 



Fruit and Seed. The ovary is inferior and two-celled, or 

 one- celled at the very base. The ovules are very numerous 

 in each cell, attached to the middle of the axile placentas and 

 anatropous. The fruit is capsular and two-celled, or one-celled 

 by the disappearance of the dissepiment, generally dehiscing 

 by two valves parallel to the septum, more rarely indehiscent. 

 The seeds are numerous, rarely solitary by abortion, and always 

 small with a membranous testa and a fleshy endosperm. The 

 embryo is minute, embedded in the endosperm, with the 

 radicle close to the hilum. 



The species of Levenhookia have generally a one-celled 

 ovary with a few seeds arising from a basal placenta and 

 more or less attached to the side walls. 



Seedlings. This Order is a small one, containing about 

 one hundred species or slightly fewer, of which the typical 

 genus Stylidium numbers about eighty- four, of various habit 

 but always herbaceous, and often with small densely ar- 

 ranged leaves somewhat resembling a Heath. S. adnatum 

 (fig. 489) is the only species observed. The cotyledons are 



II. M 



