LOTUS 
463 
that it is sometimes toothed, some people look upon it as a calyx, 
but on the ground that it also appears in the ? llr. of Viscum — the 
Viscoideae being otherwise without it — many people look upon it 
as an outgrowth of the axis, and this is perhaps the safest view. The 
perianth may be either sepaloid or petaloid. Firs, g or unisexual. 
Sta. as many as, and (as in Proteaceae) united with, the perianth- 
leaves. The pollen is often developed in a great number of loculi, 
separate from one another, though often becoming continuous when 
mature. Ovary i-loc., sunk in, and united with, the receptacle, the 
ovules not differentiated from the placenta. Embryo-sacs more than 
one, curiously lengthened (cf. Casuarina). The fruit is a pseudo- 
berry or -drupe, the fleshy part being really the receptacle. Round 
the seed is a layer of viscin, a very sticky substance. [For full details 
of the many interesting features of this order, the infl., fir., pollen, 
development and structure of ovule and embryo-sac, fruit, seed, 
germination, haustoria, &c. , see Engler in Nat. PJl. and papers by 
Wiesner in Sitz. k. Akad. Wien, cm. 1894, and Keeble in Trans . 
Linn. Soc. v. 1896.] 
Classification and chief genera (after Engler) : 
I. LORANTHOIDEAE (with calyculus): Struthanthus, Lor- 
anthus, Psittacanthus. 
II. VISCOIDEAE (without calyc.): Arceuthobium, Viscum. 
Diagram of Loranthus (after Eichler). c, calyculus. 
Loranthus Linn. Loranthaceae (1). 200 sp. trop. Semi- parasites. 
The g or unisexual firs, are in small cymes, the bracts adnate to the 
peduncles. Fruit like that of Viscum. See Nat. Pfi ., Eichler’s 
Bliithendiag. and papers by Wiesner and Keeble (see order). 
Loreya DC. Melastomaceae (1). 10 sp. S. Am. 
Loropetalum R. Br. Hamamelidaceae. 1 sp. Khasias, S. China. 
Lotononis Eckl. et Zeyh. Leguminosae (ill. 3). 60 sp. Afr., Medit. 
Lotus (Tourn.) Linn. Leguminosae (in. 5). 80 sp. temp. Eur., As., S. 
Afr., Austr. L. corniculatus L., bird’s foot trefoil, and others, in Brit. 
The floral mechanism is of interest, being typical of many of the order 
(q.v.). The keel is united above and below, leaving only a small 
