344 



WEEDS AND USEFUL PLANTS. 



seated in a cup-shaped disk in the thickened concave apex of the pedun- 

 cle, the disk finally becoming fleshy, embracing the base of the nut- 

 like seed. Cotyledons 2, linear, elongated. Trees ; leaves plicately invo- 

 lute in the bud, deciduous, alternate or somewhat fasciculate, on long- 

 petioles, fan-shaped and striate nerved, more resembling pkyllodia than 

 true leaves. 



1, S. adiantifo'lia, Smith. Leaves 

 broadly wedge-shaped and trun- 

 cate, or inversely deltoid, often 

 bifidly incised at the apex, coria- 

 ceous and striate with diverging 

 nerves. 



ADIANTUM-LEAVED SALISBURIA. 

 Giugko, or Jinkgo. 



Stem 40-80 feet high, with a light grey 

 bark, and branching, with something the 

 habit of an Aspen. Leaves 2 3 inches 

 long and 3-4 inches wide at apex ; petioles 

 about 3 inches in length. 



Cultivated : a native of Japan. 



06s. A remarkable tree, and 

 very unlike the rest of the family 

 in its general appearance. For a 

 long time there was but one speci- 

 men in the country, but it is now 

 becoming frequent in cultivation. 



ENDOGENOUS PLANTS. 



STEM not distinguishable into bark, wood, and pith ; the woody fibre 

 and vessels collected into bundles and irregularly distributed through 

 the cellular tissue ; perennial stems without annual layers. Leaves 

 mostly parallel-veined and sheathing at base, almost always alternate or 

 scattered, and not toothed. Parts of the flower usually in threes. Em- 

 bryo with a single cotyledon. 



ORDER LXXII. ARA'CEJE. (ARUM FAMILY.) 



Perennial Jierbs with an acrid or pungent juice, simple or compound leaves, with petioles 

 sheathing at base, and monoecious or perfect flowers crowded on a spadix, which is 

 usually surrounded by a spathe. Floral envelopes none or of 4 - 6 sepals. Fruit usually 

 a berry ; seeds with fleshy albumen, or sometimes a large fleshy embryo, without albumen. 



1. AEIS^E'MA, Martins. INDIAN TURNIP. 



[A play upon Arum, the ancient name.] 



Flowers monoecious, with the pistillate below on the same spadix, or 



FIG. 242. A branch of the Gingko or Jinkgo Tree (Salisburia adiantifolia) . 



