400 Key to the System of 



scattered, from lanceolar- to elongate-linear, recurved- 

 pointed, entire, sometimes channelled ; flowers compara- 

 tively large, axillary, solitary, on rather short stalklets; 

 segments of calyx from cuneate- to spatular-elliptical, 

 quite attenuated towards the base, their veinlets con- 

 spicuous ; lowest lobe of the corolla about as broad as 

 long ; stamens slightly exserted ; fruit relatively small, 

 from narrow- to ovate-ellipsoid, dry, invested with short 

 hairlets. E. oppositifolia. 



Segments of the calyx foliaceous in texture, acute ... 1744 



1744. Leaves mostly linear. 



A desert -species, never tall; branchlets rigid, very 

 spreading ; leaves distant, very narrow, somewhat 

 channelled, quite entire, glabrous ; flowers large, axillary, 

 solitary, on conspicuous stalklets ; segments of the calyx 

 from cordate- to ovate-lanceolar, recurved-pointed; corolla 

 glabrous outside, its tube ample, its lowest lobe about as 

 broad as long, yellowish and dotted towards the orifice ; 

 stamens quite enclosed; fruit dry, ellipsoid-ovate, gradually 

 much pointed. ZS. polyclada. 



Leaves mostly elongate-lanceolar. 



A tall and glabrous desert-species, finally somewhat ar- 

 borescent ; branchlets lax, often pendent, rather sticky ; 

 leaves long, from narrow- to linear-lanceolar, quite entire ; 

 flowers large, axillary, solitary, on rather conspicuous 

 stalklets, often bent downward ; segments of calyx firm ; 

 corolla much dotted inside, its lowest lobe broader than 

 long, slightly cleft ; longest stamens somewhat emerging ; 

 fruit comparatively large, dry, generally ovate-globular. 

 Figure 108. E. bignoniflora. 



1745. Leaves much elongated. 



A tall desert-species, finally somewhat arborescent, much 

 beset with minute greyish hairlets ; branchlets lax, 

 somewhat pendent ; leaves long, from narrow- to linear- 

 lanceolar, gradually pointed, quite entire ; flowers axillary, 

 solitary or two together on usually short stalklets ; calyx 

 quite small ; corolla dull-reddish, also externally invested 

 with hairlets, much dotted inside, its lowest lobe longer 

 than broad ; stamens enclosed or slightly exserted ; fruit 

 comparatively small, nearly globular, the outer portion 

 succulent, externally blackish. E. longifolia. 



Leaves hardly elongated or quite abbreviated ... 1746 



