248 



OX SEEDLINGS 



The cotyledons of Phacelia tanacetifolia (fig. 531) are linear, 

 petiolate and one-nerved. The first two pairs of leaves are 

 opposite and twice divided with ovate-oblong primary segments. 

 The secondary divisions are entire or toothed. The first three 

 leaves of Phacelia Wrangeliana are small and ovate. 



Nemophila maculata, Benth. 



Ovary two- to twelve-ovuled ; ovules pendulous, anatropous. 

 Fruit a one-seeded capsule. 



Seed variously angled, generally almost subrotund, from 3-4 mm. 

 in diameter ; testa rugose, dark brownish ; hilum inconspicuous ; 

 seed slightly flattened laterally. 



Endosperm light brown, fleshy, copious, ruminated. 

 Embryo straight, embedded in the endosperm, colourless, coty- 

 ledons suborbicular or oblong, obtuse, entire, sessile, plano-convex, 

 closely adpressed with their edges to the axis ; radicle terete, obtuse, 



rather longer than the coty- 



/} ledons, which lie in the 



broader way of the seed. 



Seedling (fig. 530). 

 Primary root suddenly 

 terminating in a slender point 

 and furnished with a few 

 lateral fibres, annual. 



Hypocotyl tapering down- 

 wards, subflexuose, terete, 

 sparsely pubescent, mostly 

 subterranean and colourless, 

 brownish at the top. 



Cotyledons foliaceous, 

 harry ; petiole channelled 

 above, dilated and connate at 

 the base, 1 cm. long ; limb 

 rotund, concave on the upper 

 side, about 8 mm. in diameter. 

 Stem annual, internodes 

 undeveloped in the young 

 state. 



Leaves simple, pinnatisect, radical (and ultimately cauline also), 

 alternate, exstipulate, petiolate, coarsely hairy on all parts, deep 

 green, sublucid. 



No. 1. Pinnatisect; terminal segment largest, tridentate ; 

 lateral segments obovate. 



FIG. 530. NemopJiila maculata. 

 Nat. size. 



