572 
SMITHIA 
Smithia Ait. Leguminosae (ill. 7). 30 sp. trop. As. Afr. 
Smithiantha O. Ktze. = Naegelia Regel. 
Smyrnium (Toum.) Linn. Umbelliferae (5). 1 sp. Medit., Eur., Brit., 
S. Olusatrum L. (Alexanders), formerly used like celery. 
Sobralia Ruiz et Pav. Orchidaceae (14). 30 sp. trop. Am. 
Soja Moench = Glycine Linn. 
Solanaceae. Dicotyledons (Sympet. Tubiflorae). 72 gen. with 1500 
sp. trop. and temp.; the chief centre is Cent, and S. Am., where 
there are 36 local genera; in Eur. and As. only sub-order II. is 
represented. Herbs shrubs or small trees; leaves in the non-flowering 
part usually alt., but in the infl. -portion alt. or in pairs; the arrange- 
ment in pairs is due to the mode of branching and adnation (p. 30), as 
illustrated in the figure. In Datura the branching is dichasial, and the 
bracts are adnate to their axillary shoots up to the point at which the 
Branching in Solanaceae (after Eichler); Datura Stramonium (left) and Atropa 
Belladonna right) 1, 2, 3, firs, or infls. of successive orders; b , bract of 1, 
a /3 bracts of 2, and so on. 
next branches arise, so that a looks like the bracteole of 2, rather than 
its bract. In Atropa the branching is cincinnal, one of the two branches 
at a node remaining undeveloped, and the bract is again adnate to 
its axillary branch. Of the pair of leaves thus found at any node, 
one is usually smaller than the other. In Solanum and others further 
complications occur (see Eichler’s Bliithendiag.). 
Firs, solitary or in cymes, £ , sometimes zygomorpliic. K (5), 
persistent ; C (5), of various forms, rarely 2-lipped, usually folded 
and convolute ; A 5, alt. with petals, epipetalous, or fewer in zygo- 
morphic firs. ; G (2), obliquely placed in the flr. (the posterior cpl. 
to the right, the anterior to the left, when shown in a floral diagram), 
2-loc., sometimes with secondary divisions (e.g. Datura), upon a 
hypogynous disc; ovules 1 — 00 in each loc., anatropous or slightly 
amphitropous, on axile placentae (most often the placentae are swollen 
and the ovules numerous) ; style simple, with 2-lobed stigma. Berry 
