WEEDS AND USEFUL PLANTS. 



seated in a cnp-shoped disk m the thickened coDcave apex of the pedun- 

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

 like seed. Cofz//ec/ons 2, linear, elongated. Trees; /eGT;es plicately invo- 

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

 petioles, fan-shaped and striate nerved, more resembling phyllodia 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. 



Adiaxtum-leaved Salisbueia. 

 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. 



Obs. 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. 



Class II. ENDOGENOUS PLANTS. 



Stem not distinguishable into hark, wcod, and pith ; the woody fibre 

 snd 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 Jlower usually in threes. Em- 

 bryo with a single cotyledon. 



Order LXXIL AEA'CE^. (Aru-M Family.) 



Peremiial herbs with an acrid or pungent juice, simple or compound leaves, with j^etvJcs 

 Bheathing at base, and monoecious or perfect flowers crowded on a spadix, \^■hi^h is 

 usually surrounded bj^ a S2?ai7ie. Floral envelopes none or of 4-6 sepals. Fridt usually 

 a berry ; seeds with fleshy albumen, or sometimes a large flesh}' embryo, without albuMerk. 



1. Am^MllA, Martins. Lxdiax Tcrxip. 



[A play upon Arum, the ancient name.] 

 Flowers monoecious, with the pistillate below on the same spadix, — oi 



Fig. 242. A branch of the Gingko or Jiukgo Tree (Sahsburia adiantifolia'). 



