ONAGRARIACE.V. 



467 



Clarkia putchella. ] 



characters of little importance. The four petals are unguiculate 

 instead of sessile, and most frequently three-lobed ; but this character 

 s not absolutely constant. The fruit 

 is capsular and loculicidal. In the 

 Clarkias proper, the receptacle is but 

 slightly prolonged in a funnel above 

 the ovary (fig. 432, 433), as in Lud- 

 wigia and some species of Œnothera, 

 whilst in EucJi/iriJium, 2 often con- 

 sidered a distinct genus, it is, like 

 that of most Onarjras, prolonged in a 

 long and slender cylindrical tube. 

 The androecium is diplostemonous ; 

 but the four oppositipetalous stamens 

 are often small and sterile. The six 



species 3 of this genus are annual 



Fig. 432. Flower Fig. 433. Trans, 

 without corolla. sect, of ovary. 



herbs of north-western America ; 



they have alternate, elongate leaves, and axillary sessile and solitary 



flowers. 



Epilobium and Zauschneria have often been placed in a small 

 separate group on account of this peculiarity, in itself of little im- 

 portance, that their ascending seeds have their chalazic region 

 charged with a long bunch of hairs (fig. 436, 437). In Zauschneria* 

 the receptacle is dilated, as in certain ŒiiotJieras, in a funnel-shaped 

 tube surmounting the ovary and bearing at its lower part eight 

 glands, four of which are ascending and four descending. 5 Z. cali- 

 fornica, 6 the only species, is subshrubby, with alternate sessile elon- 

 gate leaves, and pretty axillary and sessile flowers. In Epilobium 8 

 (fig. 434-437), on the contrary, the receptacle is arrested, as in 



1 Figures from the work of Spach [Suit, à 

 Buffon, Atlas, t. 3.5). 



- Fisch. et Mey. Ind. ii. (1835) Sent. Hort. 

 Petr, 36. — Spach, Nouv. Ann. iv. 395. — Endl. 

 Gen. n. 6120.— B. H. Gen. 790, n. 9.— II. Bn. 

 Bayer Fam. Nat. 374. 



3 Lindl. Bot. Reg. t. 1100, 1575, 1962 (En- 

 charidium), 1981. — Torr. et Gr. Fl. N.-Amer. 

 i. 515, 516 {Eueharid'mm).—Bol. Mag. t. 2918 — 

 Walp. Rep. ii. 89. 



4 Presl, Rel. Kcen/s. ii. 28, t. 52.— Spach, 

 Nouv. Ann. Mus. iv. 405 ; Suit, à Buffo», iv. 400. 

 — Esdl. Gen. n. 6122.— B. H. Gen. 788, n. 2. 



5 The latter are oppositipetalous. 



6 Presl, he. cit. — Torr. et Gr. Fl. N.-Amer. 

 i. 486.— Hook. Bot. Mag. t. 4493.— Walp. Rep. 

 ii. 93. — Z. mexicana Presl. 



7 Very variable in form, down, etc. 



» Epilobium L. Gen. n. 471.— J. Gen. 319.— 

 Gjurtn. Fruct. i. 157, t. 31. — Lamk. Diet. ii. 

 373 ; Suppl. ii. 568 ; III. t. 278.— DO. Prodr. iii. 

 40. — Spach, Nouv. Ann. Mus. iv. 403 ; Suit, à 

 Buffon, iv. 398.— Endl. Gen. n. 6121.— Payer, 

 Organog. 450, t. 94.— B. H. Gen. 471, n. 1.— H. 

 Bn. Payer Fam. Nat. 273. — Hook. Fl. Ind. ii. 

 582. — Chamœnerium Tausch, Mort. Canal. 1. — 



30—2 



