POLEMONIACE^E 



241 



from the upper surface, but better from beneath. A few are found a 

 little way below the apex, but not so many nor so conspicuous as in 

 Galium Aparine. The tissue immediately beneath the apex con- 

 sists of polygonal cells with numerous small chlorophyll granules 

 arranged round their sides, covered with wavy-outlined epidermal 

 cells. The epidermal cells on the rest of the cotyledon are larger and 

 very wavy, while the chlorophyll granules immediately beneath are 

 very large and globose-ovoid, glabrous, deep opaque green above, 

 paler beneath, subfleshy ; lamina 8-10 mm. long, 6'5-7'5 mm. wide ; 

 petiole channelled above, glandular-pubescent, subperfoliate at the 

 base, 4-5 mm. long. 



Stem annual, branched, elongated when about to flower ; primary 

 internodes undeveloped. 



Leaves simple, radical and cauline, alternate (lower ones oppo- 

 site), exstipulate, petiolate, obscurely and alternately incurvinerved 

 with the nerves uniting close to the margin, glandular-pubescent on 

 both sides, deep opaque 

 green above, paler be- 

 neath ; petioles short, 

 broad, channelled above, 

 dilated at the base and 

 subperfoliate in the op- 

 posite leaves. 



First pair lanceolate- 

 elliptic, entire, mucro- 

 nate, obtuse. 



Second pair lanceo- 

 late, subacute, mucro- 

 nate, entire or having 

 one to two teeth on each 

 side. 



Gilia crassifolia, 

 Benth. (fig. 527). 



Primary root long, 

 slender, tapering, with 

 numerous lateral root- 

 lets, annual. 



Hypocotyl tapering 

 downwards, colourless, 

 subterranean and merging into the root. 



Cotyledons spathulate, petiolate, glabrous; petiole flattened 

 above, convex beneath, dilated and connate at the base, 6 mm. long ; 



n. R 



FIG. 527 Gilia crassifolia. Nat. size. 



