ONAGRACEAE 
5 OT 
2— 6-merous, sometimes poly- or a-petalous (Fraxinus, &c.). K typi- 
cally (4), valvate; C (4) valvate or imbricate, rarely convolute. Sta. 
2, epipetalous usually transversely placed, and alt. with cpls. No 
disc. G (2); stigma 2-lobed on simple style; ovary 2-loc. with 2 
anatropous ovules in each loc. Fruit a berry, drupe, or capsule, or 
schizocarp, with 1 — 4 seeds. Endosperm or none, embryo straight. 
Olea, Fraxinus, &c. , are of economic value. 
Classification and chief genera (after Knoblauch) : 
I. OLEOIDEAE (seeds pendulous; fruit not constricted) : 
1. Fraxineae (samara) : Fraxinus. 
2. Syringeae (loculicidal capsule): Forsythia, Syringa. 
3. Oleineae (drupe or berry) : Phillyrea, Olea, Ligustrum. 
II. JASMINOIDEAE (seeds usually erect; fruit constricted ver- 
tically) : Jasminum. 
[fi asminoideae are sometimes classed as a separate family, but their 
characters are not very constant, and all of them occur occasionally 
in Oleoideae. Benth. -Hooker place O. in Gentianales, Warming in 
Contortae.] 
Oleandra Cav. Polypodiaceae. 6 sp. trop. 
Olearia Moench. Compositae (ill). 90 sp. Austr., N. Z., Auckland 
Is. The genus replaces Aster in these regions, and closely resembles 
it. They are, however, all trees or shrubs. 
Olinia Thunb. Oliniaceae. 6 sp. Afr. 
Oliniaceae. Dicotyledons (Archichl. Thymelaeales). Only genus Olinia. 
See Nat. Pfl. for details. Placed in Lythraceae by Benth. -Hooker. 
Omphalea Linn. Euphorbiaceae (A. II. 7). 10 sp. trop. Am., 1 Madag. 
Omphalodes Tourn. ex Moench. Boraginaceae (iv. 1). 24 sp. Eur., 
As., Mexico. The borders of the achenes are inrolled, so that each 
fruit is boat-shaped. 
Onagra (Tourn.) Adans. = Oenothera Linn. 
Onagraceae. Dicotyledons (Archichl. Myrtiflorae). 36 gen. with 470 
sp., chiefly N. temp, (see Epilobium). Most are perennial herbs, a 
few shrubs or trees. Leaves alt., opp., or whorled, simple, rarely stip. 
Firs, solitary in the leaf-axils or in spikes, racemes or panicles, $ > regu- 
lar or zygomorphic, usually 4-merous (sometimes 2 — 5). The ovary is 
inferior and the axis is prolonged beyond it into a tube (‘calyx-tube’). 
K4, valvate; C 4, usually convolute; A 4 + 4, or 4, 2, or 1. G (4), 
4-loc. with axile placentae and 00 anatropous ovules; the septa are 
commonly imperfect below ; style simple. The firs, are mostly adapted 
to bees or Lepidoptera and are often markedly protandrous; those 
of sp. of Lopezia are explosive. Fruit usually a loculicidal capsule, 
sometimes a nut or berry. Seeds exalbuminous. Many are cultivated 
as ornamental flowers. 
Classification and chief genera (after Raimann) : 
A. Fruit an co -seeded capsule. Axis not prolonged above ovary. 
Bracteoles present. 
