308 ON SEEDLINGS 



Third pair triangular, subacute, pinnatifid at the base with the 

 lobes oblong, obtuse, and like the upper part of the leaf simply or 

 doubly serrate. 



Alonsoa incisaefolia, Euiz et Pav. 



Hypocotyl erect, terete, pubescent or hairy, l-S-2'5 cm. long, 

 light green or colourless. 



Cotyledons membranous, ovate-rotund, obtuse, emarginate 

 (though very young ones seem almost entire), petiolate, covered 

 with rather long glandular hairs, light green, one-nerved. 



Stem erect, terete, herbaceous ; 1st internode 3-5 mm. long. 



First leaves simple, deeply and obtusely serrate, cauline, oppo- 

 site, acute, petiolate, exstipulate, covered with hairs, light green, 

 pinnatinerved. 



Linaria purpurea, Mill. 



Ovary two-celled, with about ten ovules in each cell ; ovules 

 peltate, amphitropous ; micropyle at one end of the horizontal ovule. 



Capsule obovoid, emarginate, postero- anteriorly furrowed at the 

 junction of the carpels, two-celled, with six to eight seeds in each 

 cell, dehiscing at the apex by two openings each with three teeth 

 or valves, 3-3'5 mm. long, 3'5-4'25 mm. wide, 2*5-3 mm. thick. 



Seeds peltate, or transverse to the receptacle, broader right and 

 left of the attachment than above and below, somewhat compressed 

 dorsally, variously angled by mutual pressure, reticulate and 

 variously ridged and furrowed ; testa thick, crustaceous, black when 

 mature ; hilum inconspicuous, ventral ; micropyle transverse and 

 either right or left of the axis. 



Seed 1-1-25 mm. wide, '5- f 6 mm. long and thick. 



Endosperm copious, fleshy, white. 



Embryo straight, colourless, nearly equal in length to the endo- 

 sperm, transverse to the placenta; cotyledons oval, obtuse, entire, 

 sessile, plano-convex, vertical to the axis with their backs to it ; 

 radicle terete, obtuse, horizontal, and pointing right or left of the 

 placental axis. 



Linaria repens, Steud,, conforms to this type. 



Linaria vulgaris, Mill. (fig. 552). 



Ovary two-celled, ovules many, seated all over a peltate enlarged 

 placenta, pendulous, anatropous or semianatropous, radicle superior. 



Capsule short, oblong, dehiscing at the apex by four to six valves, 

 two-celled, many-seeded (seeds about one hundred and twelve). When 

 fresh 8-10 mm. long and 5-7 mm. in diameter. 



