CHENOPODIACEJj! 421 



lanceolate with long petioles. The first pair of leaves are 

 lanceolate and subhastate. 



Beta vulgaris has linear-oblong or spathulate cotyledons, 

 and the first pair of leaves are broadly oval. Atriplex 

 oblongifolia has elliptic-oblong, obtuse cotyledons, and the 

 first pair of leaves are sagittate. 



A number of seedlings are notable for the great length of 

 their linear cotyledons. An instance of this is Spinacia 

 oleracea. The first pair of leaves are broadly oval. The 

 cotyledons of S. glabra (fig. 612) are much longer, more 

 truly linear, and measure from 3 to 8 cm. in length. Those 

 of Threlkeldia rostrata (fig. 613) are linear, fleshy, glandular- 

 pubescent and recurved. The first thirty leaves at least are 

 linear, fleshy and narrower than the cotyledons. The latter 

 in Salsola Tragus are linear, semiterete, fleshy and 2 - 6- 

 3-5 cm. long. The leaves are all terete and fleshy. 



The most remarkable type I have noticed is that of 

 Basella alba (fig. 614). The genus according to some authors 

 constitutes the type of a distinct Order. The cotyledons are 

 oblong, obtusely pointed, almost sessile, and fleshy with a few 

 indistinct nerves on each side of the midrib, 5'9 cm. long 

 and 2'2 cm. wide. The first two leaves are opposite or nearly 

 so, broadly oval and obliquely emarginate. 



Chenopodium petiolare, H. B. K. 



Ovule campylotropous. 



Seed small, from -25-'5 mm. long, orbicular and somewhat 

 laterally compressed ; testa smooth ; hilum inconspicuous. 



Endosperm rather copious, central, surrounded by the periphe- 

 rical embryo, greyish. 



Embryo as in C. Bonus-Henricus. 



Chenopodium Bonus-Henricus, L. (fig. GOO). 



Ovule vertical or rather horizontal, amphitropous ; micropyle 

 inferior. 



Fruit a utricle, one-celled, one-seeded, indehiscent, small. 



Seed reniforin, subcompressed laterally, smooth, shining, black ; 

 testa crustaceous ; hilum basal. 



Endosperm floury, white, forming a mass on the basal side and 

 centre of the seed, and a thin film round the periphery and between 

 the embryo and the outer ridge of the seed. 



