582 Lxii. ONAGEACEiE. (0. B. Clarke.) 



Ordek LXn. OITAGRACE2B. (By 0. B. Clarke, F.L.S.) 



Herbs, rarely imdershrubs, sometimes aijuatic. Leaves opposite or alternate, 

 entire or toothed, imdi-nded (in Trapa the submersed leaves pinnatipartite), 

 exfltipulate. Flowers hermaphrodite, mostly axillary and solitary, or spiked or 

 raeemed towards the ends of the branches ; subirregular. Calyx-tube whoUy 

 adnate to the ovary (half-adnate in Trapd), limb of 2-5 valvate lobes. PetcUs 

 epigynous, alternate with the calyx-lobes, rarely 0. Stamens as many or twice 

 as many as the petals, inserted with them. Ovary inferior (half-inferior in 

 Trapa), l-B-celled, most often 4-ceUed ; style 1, cylindric or subulate, stigma 

 capitate or nearly 2-lohed or 4-fid ; ovules one or many in each cell, pendulous 

 or half-ascending, placentas axile. Fruit various, dehiscent or indehiseent, 

 membranous capsular or bony, 1- or several-celled, 1 or oo-seeded. Seeds with- 

 out albumen, or nearly so. — Disteib. Species SOO, spread throughout the world, 

 most abundant in the North Temperate Zone. 



(Enoihera is an American genus of which several species are cultivated in India : 

 aid among these (E. rosea has run wild in the North-west Himalaya and in the Nil- 

 ghiris ; (E. tetraptera and (E. odorata have also run wild on the Nilghiris. 



* Seeds very many. 



f Seeds comose . . 1. Epilobium. 



ft Seeds not comose. 



Stamens twice as many as calyx-lobes .2. Jtjssijea. 



Stamens as many as calyx-lobes 3. Ludwigia. 



** Seeds one of two. 



Terrestrial. Stamens 2 4. CiECiEA. 



Aquatic. Stamens 4 5. Teapa. 



1. i:PXZ.OBXUia, Linn. 



Herbs. Leaves alternate or opposite, undivided, entire or toothed. Floicers 

 axillary and solitary, or raeemed or spiked towards the ends of the branches, 

 purple or white, regular or iiTegular. Calyx-tube scarcely produced above the 

 ovary, linear; teeth 4, lanceolate, deciduous. Petals 4, obovate, retuse or 

 notched. Stamens 8, epigynous, 4 shorter. Ovary inferior, 4-ceUed ; style 

 cylindric, stigmas 4 spreading or more or less combined ; ovules many, axile, 

 ascending, attached along a double placental vertical line in the inner angle of 

 each cell. Capsule Unear, 4^oelled, dehiscing from the apex loculicidaUy, valves 

 4 recurved from the seed-bearing quadrangular column. Seeds very many, 

 obovoid or ellipsoid, crowned by long silky hairs. — Distrlb. Species 50 ; spread 

 throughout the temperate and cold regions of the world, plentiful in New 

 Zealand : appearing in the mountains only of the warmer regions. 



Sect. I. Cliamaeneriuin. Flowers irregular. Stamens deflexed on one 

 side. Style bent on one side in sestivation. 



1. E. ang'ustifoliuin, lAnn. ; Boiss. Fl. Orient, ii. 745 ; leaves narrow 

 lanceolate glabrous beneath or nearly so reticulating nerves prominent primary 

 nerves diverging nearly at right angles from the midrib, peduncles approximate 



