378 Key to the System of 



IVXARSDENIA. 



1659. Leaves narrow. 



Desert-plant, greyish -green, often invested with minute 

 hairlets ; leaves elongate- and broadish-linear ; flowers 

 rather large, in simple axillary umbels ; lobes of corolla 

 glabrous, hardly as long as the tube ; fruit very turgid, 

 dehiscent by a single longitudinal fissure. " Doubah." 



M. Leichardtiaua. 



Leaves broad ... ... 1660 



1660. Flowers in simple umbels. 



Sylvan plant, comparatively robust ; leaves on long stalks, 

 from ovate to cordate-orbicular, pointed ; flowers fragrant ; 

 corolla whitish with a green-yellowish tinge, its lobes 

 blunt, inside imperfectly beset with short hairlets ; fruit 

 very turgid, dehiscent by a single longitudinal fissure. 



M. rostrata. 



Flowers in compound cyme-like umbels. 



Sylvan plant, often invested with minute hairlets ; root 

 producing tubers ; leaves on short stalks, from oval- to 

 lanceolar-elliptical ; flowers quite small ; corolla greenish- 

 yellow, the lobes glabrous ; fruit rather slender, dehiscent 

 by a single longitudinal fissure. M. flavescens. 



APOCYNEAE. 



AX.1TXXA. 



1661. Leaves from orbicular- to elliptic-obovate. 



Mostly maritime, occasionally somewhat trailing, glabrous ; 

 leaves very firm, comparatively small, recurved at the 

 margin, their lateral venules concealed ; flowers small, 

 terminal, few together, almost sessile, fragrant ; corolla 

 brownish- or reddish-yellow outside, whitish inside ; 

 stamens enclosed ; fruitlets orange-colored outside, often 

 one-seeded or occasionally with two to four seeds and 

 constricted between them. 



(Gynopogonbuxifolius.) A. buxifolia. 



LYONSIA. 



1662. Leaves from ovate- to linear-lanceolar. 



Sylvan, amply winding, robust ; roots producing tubers ; 

 leaves very firm, comparatively long, greyish beneath ; 



