310 



ON SEEDLINGS 



Stem undeveloped in the early stage of the plant. 



Leaves alternate, or more often opposite, three- to five-nerved 

 at the base and alternately nerved upwards, reticulate, pubescent, 

 membranous ; petioles generally long, tapering upwards. 



No. 1. Long-stalked, cordate-ovate, obtusely serrate, lower half 

 with palmate nerves, upper pinnatinerved, 3-4 cm. long, 1*75 cm. 

 broad, pubescent, thin, bright green above, paler beneath. 



Nos. 2 and 3. Pinnatifid with three to five lobes, otherwise as in 

 No. 1. 



Linmanthes Douglasii, E. Br. (fig. 230). 



Primary root tapering, small, furnished with lateral rootlets at 

 the base, or these are adventitious on the end of the hypocotyl. 

 Numerous strong adventitious roots also given off at the end of the 

 hypocotyl close to the base of the cotyledons ; annual. 



Hypocotyl stout, subterranean, terete or more or less flattened, 

 colourless, succulent, l'4-2 cm. long. 



Cotyledons petiolate, rotund-cordate, 

 usually minutely emarginate, and marked 

 at the apex with a small black scar, tipped 

 with white, rather succulent, convex 

 above and striate with broad shallow 

 ridge-likeveins, glabrous, deep green, sub- 

 concave beneath and minutely wrinkled, 

 paler green; petiole semiterete, chan- 

 nelled above, dilated and sheathing at 

 the base, seated rather deeply in the 

 sinus of the leaf, glabrous. Lamina 

 variable in size, 5-7 mm. long and as 

 broad. 



Stem herbaceous, annual and de- 

 veloped when about to flower. 



Leaves simple, radical and-cauline, 

 alternate, exstipulate, petiolate, gla- 

 brous, rather succulent, simply or bi-pinnatifid or -sect; petioles 

 semiterete, channelled above, dilated and sheathing at the base, 

 glabrous. 



No. 1. Ternately pinnatisect, often with five segments, which 

 are shortly stalked but inarticulated, with the rachis rotund ; mucro- 

 nate, obscurely alternately veined. 



Nos. 2 and 3. Pinnatisect, each with five or more segments ; 

 segments rotund, mucronate. 



Ultimate radical leaves ovate or oblong-lanceolate, bipinnati- 



FIG. 280. 



Linmanthes Douglasii. 

 Nat. size. 



