ONAGRARIACE^. 



467 



ClarJiia pulchella} 



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 

 Clarhias proper, the receptacle is but 

 slightly prolonged in a funnel above 

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

 wigia and some species of CEnothera, 

 whilst in Eucharidium,^ often con- 

 sidered a distinct genus, it is, like 

 that of most Onagras^ 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^ of this genus are annual 

 herbs of north-western America ; 

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

 flowers. 



Epilohium 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 (Eaotlieras^ in a funnel-shaped 

 tube surmounting the ovary and bearing at its lower part eight 

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

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

 gate leaves, and pretty axillary and sessile flowers. In Epilohium ^ 

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



Fig. 432. Flower Fig. 433. Trans, 

 without corolla. sect, of ovary. 



1 Figures from the work of Spach {Suit, a 

 Bufon, Atlas, t. 35). 



2 FiscH. et Mey. Ind. ii. (1835) Sent. HorL 

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

 Gen. n. 6I20.-B. H. Gen. 790, n. 9.— H. Bn. 

 Payer Fam. Nat. 374. 



3 LiNDL. Bot. Reg. t. 1100, 1575, 1962 {Eu- 

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

 1. 515, 516 {Eucharidium).—Bot. Mag. t. 2918.— 

 Walp. Rep. ii. 89. 



iPRESL, Rel. Emnk. ii. 28, t. 52.— Spach, 

 Nouv. Ann. Mus. iv. 405 ; Suit, a Bufon, iv. 400. 

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



5 The latter are oppositipetalous. 



6 Presl, loe. cit. — Torr. et Gr. Fl. N.-Jmer. 

 i. 486.— Hook. Bot. 3fag. t. 4493.— Walp. Rep. 

 ii. 93. — Z. mexicana Presl. 



7 Very variahle in form, down, etc. 



8 Fpilobium L. Gen. n. 471.— J. Gen. 319.— 

 GiURTN. Fn^ct. i. 157, t. 31.— Lamk. I>iet. ii. 

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

 40. — Spach, Nouv. Ann. Mus. iv. 403 ; SuU. d 

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

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

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

 582.— Chamcenerium Tausch, Sort. Canal. 1. — 



30—2 



k 



