I 



ONAGRARIACEM. 



463 



(Enothera speciosa. 



All the (Enotheras whose flower and fruit have the essential 

 characters of Onagra have been ranged in a section Ewcenothera} 

 Those called Meriolix'^ {(E. serrulata) have a 

 little shorter receptacular tube and a stigma 

 dilated in the form of a disk. The petals are 

 not entire. In Megapterium^ ((E. macrocar' 

 pay missourieims), the receptacle is dilated 

 around the fruit in large and thick vertical 

 wings.* Taraxia^ (CE. ovata, Nuttallii^ etc.) 

 has also sometimes [CE. graciliflora) winged 

 fruit. The receptacular tube is long and 

 slender ; the stigma is capitate, the fruit ses- 

 sile and the stem very short. Cratericar- 

 jpium^ {CE. suhulata) has the characters of 

 the preceding sections, with a 4-dentate 

 stigma, stamens with small anthers and fruit 

 dilated at the summit. Hartmannia^ (CE. 



rosea, tetraptera), like Cratericarpiuin, is from South America. The 

 fruit is often enlarged above, and the stigma is deeply divided into 

 four lobes. The seeds are contained in distinct cavities of the 

 pericarp. 



Boisduvalia ^ and Godetia, by some distinguished as genera, have 

 been, by others, referred to this type as simple sections. In the 

 former, the receptacle rises above the ovary forming a funnel-shaped 

 cup the height of which is nearly that of the ovary itself. In Godetia,^ 

 this open portion is shorter and especially extends a less distance 

 downwards. ^^ In both the extremity of the style is divided into 



Fig. 430. Flower. 



1 ToRR. et Gr. FL N.-Amer. i. (1840) 492.— 

 Wats. Proc. Amer. Acad. viii. (1873) 574, 579 

 (incl. : Onagra T. loc. cit. — Anogra Spach, Nouv. 

 Ann. Mus. iv. 323, 324. — Kneiffia Spach, Nouv. 

 Ann. Mus. iv. 364 ; Suit, a Buffon, iv. 373.— 

 Pachylophis Spach, Nouv. Ann. 356, t. 30 ; Suit. 

 365. — Xylopleurum Spach, Nouv. Ann. iv. 369 ; 

 Suit. iv. 369. — Lavauxia Spach, N. Ann. 357, t. 

 31 ; Suit. 367 (part, ex Wats. loc. cit. 585).— 

 Baiimannia Spach, Suit. 351). 



2 Kafin. Amer. Monthl. Mag. [1819] cxEndl. 

 Gen, 1190. — Calylophis Spach, N.Ann. Mus. iv. 

 ZZl .—Calylophus Spach, Suit, d Buffon, iv. 366. 



3 Spach, Nouv. Ann. Mm. iv. 350 ; Suit, a 

 Buffon, iv. 363. 



^ They recall in form and consistence a -jreat 



number of Combretacece with winged fruit. 



5 NuTT. ex ToRR. et Gr. Fl. N. Amer. i. 506. 

 — Wats. loc. cit. 588, 605.— Frimtdopsis Torr. 

 et Gr. loc. cit. 507. 



^ Spach, Nouv. Ann. Mus. iv. 397. 



'' Spach, Nouv. Ann. Mus. iv. 397 ; Suit, a 

 Buffon, iv. 370. 



8 Spach, Nouv. Ann. Mus. iv. 327, t. 31 ; Suit, 

 a Buffon, iv. 383.— Endl. Gen. n. 6118.— Wats. 

 loc. cit. 578, 600. 



9 Spach, Nouv. Ann. Mus. iv. 326, t. 39 ; Suit, 

 a Buffon, iv. 386.— Wats. loc. cit. 577, 596; 

 Geol. Surv. Calif. Bot. i. 221. 



^0 By this character, Godetia is intermediate 

 between Boisduvalia and Sphccrostigma, and ap- 

 pears, consequently, inseparable from either. 



