LYIII. OlNAGRARIACEiE. 



I. (ENOTHERA SERIES. 



This family owes. its name to Onagra (flg. 427-429), tlie best 

 known species among us of the genus (Enothera} Its flowers are 

 regular and hermaphrodite. The receptacle has the form of a very- 

 long gourd, the bottom of which envelopes the ovary, quite inferior, 

 and is prolonged upwards in a very long and narrow tubular neck, 

 dilated above and bearing on the margin of its orifice the perianth 

 and andrceeium. It is throughout lined with a disk, a thin glandular 

 layer, covered with hairs, a little thickened near its opening and 

 especially immediately above the summit of the ovary. The calyx 

 is formed of four sepals,^ two lateral, an anterior and a posterior, 

 valvate in prefloration. With them alternate four petals, sessile, and 

 contorted in the bud. The andrceeium is composed of eight stamens 

 inserted close to the corolla and forming two verticils. Four are 

 superposed to the sepals and four, a little shorter, to the petals. The 

 filament is free and the anther versatile, bilocular, introrse, dehiscing 

 by two longitudinal clefts.^ The ovary, inferior, has four oppositi- 

 petalous cells, and is surmounted by a long slender style, the stigma- 

 tiferous extremity of which is divided into four large conical lobes. 

 In the internal angle of each cell is a longitudinal placenta, charged 

 with anatropous ovules, obliquely ascending, with micropyle turned 



• L. Gen. n. 469. — J. Gen. 319. — Lamk. III. t. raxia Ndtj. Xylopleurum Spach). 



279. — PoiR. Diet. iv. 550 ; Suppl. iv. 141. — DC. 2 m. Duchaetrb {Ann. Sc. Nat.sfyo. 3, xviii. 



Prodr. iii. 45. — Spach, Suit, a Buffon, iv. 353; 339) erroneously considers the calyx of fflKt)tte»-a 



N. Ann. Mm. iv. (1835) 341. — Endl. Gen. n. mmeolens as gamosepalous. Its parts are, on 



6116. — B. H.Gen. 789, n. 8. — H. Bn. payer Fam. the contrary, free at every age. 



Nat. 376. — OnagraH. Inst. 302, t. 156. — Adans. ' The pollen, in this series, presents very re- 



Fam. des PL ii. 85 (incl. : Agassieia Spach, Ano- markahle peculiarities. It is " flattened, trian- 



gra Spach, Baumannia Spach, Blennoderma gular with papillae on the angles ; transparent 



Spach, Boisdwealia Spach, Oalylophus Spach, or opaque; external membrane punctuate, united 



Chamissonia Link., Chylisma Spach, Cratericar- on the papillae " (H. Mohl, Ann. Se. l^lat. s^r. 2, 



pium Spach, Godetia Spach, Sartmannia Spach, iii. 332). The same author distinguishes, by the 



Solostigma Spach, Eneiffia Spach, Lavauxia largeness of the papillEB, that of (Enothera, 



Spach, Megapterium Spach, Meriolix Rapin. Clarkia, Oireeea, whUet the papillae are small in 



Paehylophus Spach, Sphcerostigma Endl. Ta- Lopezia and Fuchsia. 



