to the Genera. | IV.—TETRANDIA. 43 
{Ovary inferior ; petals cea af 42] 
2. Ludwigia. 
§Styles 2 or more than 2, free :—[p. oT 
Trees or shrubs ; stamens — zs petals 
5. Homalium. 
Small viscid-glandular herbs a insectivorous 
leaves; stamens alternate with the peti 
++Petals united in a gamophyllous corolla; ovary 
superior :—[p. 
Stamens opposite the corolla-lobes ; leaves entire :— 
rae annual herbs; seeds many in a circumscissile 
516. Centunc 
us. 
Shrabe, mostly climbing; seeds solitary in a small 
erry-like fruit 518. Embelia. 
Stamens alternate with the corolla-lobes 
orolla plicate in bud; ovules many; leaves entire, 
or variously lobed or pinnately cut ; “ae or herbs, 
often prick . Solanum. 
Corolla-lobes imbricate in bud; bere ert or with 
each cham of a 4-celled ovary; corolla quite 
regular :— 
Styles 2; a prostrate herb........---- 609. Coldenia. 
— terminal on an entire ovary; trees or 
shru 
ces es a twice 2-partite stigma, not 
annulate ......s++++ ..604. Cordia. 
Style shortly 2-lobed, with a borisonted ring 
below the stigma .........--- 605. Tourn ia. 
—— many in each cell of a 2-celled ovary; 
rolla somewhat oblique; herbs.....-.-. 642. Celsia. 
+Leayes sual :—{p. 4 
Perianth single; trees; lobes of perianth valvate :— 
Ovary 1-celled; ovules 2-3 on a free central placenta ; 
stamens — Ss -lobes «.-+++++++++ 810. Santalum. 
vary many on axial placentas ; 
stamens ican with ise aa -lobes 
346. Crypteronia. 
Perianth double, or if single (Ammannia sometimes), then 
small herbs :— 
