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582 Lxii. ONAGRACE^. (C. B, Clarke,) 



. Oeder LXII. ONAGRACES:. (Bj 0. B. Clarke, F.L.S.) 



" Herbs, rarely undershrubs, sometimes aquatic. Leaves opposite or alternate, 

 \ entire or toothed, undivided (in Tra^a the submersed leaves pinna tipartite), 

 '" ' esstipulate. Flowers hermaphrodite, mostly axillary and solitary, or spiked or 

 racemed towards the ends of the branches ; subirregular. Cahjx-tuhe wholly 

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

 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), 1-6-celled, most often 4-celled ; style 1, cylindric or subulate, stigma 

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

 or half-ascending, placentas axile. Fmiit various, dehiscent or indehiscent, 

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

 out albumen, or nearly so. — Distkib. Species 300, spread throughout the world, 

 ■ most abundant in the North Temperate Zone. 



,- . (Enoihera is an American genus of which several species are cultivated in 1^^^^ * 

 and 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. 



I 



* Seeds very rnany. 



•f Seeds comose 1. EpiLOBitrM. 



ft Seeds not comose. 



Stamens twice as many as calyx-lobes" ..-...'•• 2. Jtissi^A. 

 Stamens as many as calyx-lobes * 3. Lupwiou. 



\ _ ■ 



•• Seeds one m* two. 



Terrestrial. Stamens 2 . . 4. Cibc^a- 



Aquatic. Stamens 4 # . * 6- Trapa. ■: 



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1. fiPZXiOBZVM, Linn 



Herbs. Leaves alternate or opposite, undivided, entire or toothed. ^'^ 

 axillary and solitary, or racemed or spiked towards the ends of the "^^^^ t ' 

 purple or white, rearular or irretrular. CnhjT^tuhp. scarcelv produced above m 



CalyX'tuhe scarcely ptf 



ovarv, linear; teeth 4, lanceolate, deciduous. Petals 4, obovate, retiise 

 notched. Stamens 8. ftnioTmnns 4 ahnrtar ni^m-^, inferior. 4-cellea ; sty^^ 



c} 



Stamens 8, epigyn 

 rtiernias 4 snreaainE 



4 shorter. Ovain/ inferior 



ovule 

 the 



axile, 



■alves 



each cell. Cajjsule linear, 4-cellod, dehiscing from the apex loculicidalJy, 

 4 recurved from the seed-beaiang quadrangular column. Seeds very m^ 

 obovoid or ellipsoid, crowned by long silky hairs.— Distrib. Species 50; sp 

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

 Zealand : appearing in the mountains onfv of the warmer reefions. 



Sect. I. Chamcenerlum 



side. 



Style bent on one side in aestivation. 



Flowers irrei^ular. Stamens 



HJ J 



i 



1. B. angrtistifollum, Linn, ; Boiss. Fl. Onent. ii. 745; l^^.f ^ij^^aty 

 lanceolate glabrous beneath or nearly so reticulating nerves prominent P^^^ 

 nerves diverging nearly at right angles from the midrib, peduncles appro^^ 



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