CE>oTHKRA. ONAGRACEiE. 499 



lint^aris, but is sessile, allliouf^li mufh attenuate at the base. The lobes of tlie 

 stigma are connivem, but tliis perhaps is nut a constant character. 



21. CE. linij'olia (Nutt.) : biennial; stem strict, simple or branched above; 

 radical leaves oblonjj-spatiilate, petioled ; the cauline ones linear-fililbnn, 

 crowded and fascirhnl; spikes slender, loosely-flowered; bracts shorter than 

 the ovary, persistent; (lowers very small; tube of the calyx rather shorter 

 than the ovary; the segments shorter than the petals; lobes of the stigma 

 very short; capsules obovate, 4-carinate, nearly sessile, hispidly puberu- 

 lent. — Null. I in. jour. acad. Philad. 2. 7;. 120,- DC! j^rodr. 3. p. 50. 

 Knoirtia linifolia, Spach! I. c. 



R<xjks and dry hills, Arkansas, NuUall! Dr. Pitcher! Dr. LeavenuorOi ! 

 Western Louisiana, Dr. Hale! Texas, Drummondl Mny-Julv. — Stem 

 about a foot high, gla1)rous excejjt near the apex. Ca])sules 2-3 Tines long, 

 slightly 4-carinate when mature, with 1-2 scarcely prominent intermediate 

 ners-es. — Diflers from tlie other species of the section in its peculiar foliage 

 and slightly lobed stigma. 



* » » * Nearly acaulescent caspitose perennial kerbs, often becoming an. 

 nual : flowers (rather large) nearly radical, erect before expansion, noctur. 

 nal, pale yellow {turning to violet or rose.color ?) : tube of the calyx fili. 

 form, very long, somewhat expanded at the summit : capsules sessile, oval 

 or obovate, cartilaginous, reticulated, with 4 cristate icings, tardily dehis- 

 cent, at length both septicidal! and loculicidal: seeds obovate, horizontal, 

 in two rows in each cell; the testa granulose and variegated, crustaceous. — 

 Lavauxia, Spach. (partly ?) 



22. CE. triloba (Nutt.) : densely caespitose; stems very short; leaves runci- 

 nate-pinnatifid, petioled, nearly glabrous ; the segments linear-lanceolate, 

 often toothed ; the terminal lobe elongated, acute, toothed ; tube of the calyx 

 very long, filiform, dilated at the summit ; the segments linear-lanceolate, 

 acuminate, rather longer than the 3-ner\'ed and somewhat 3-lobed petals ; 

 stamens and style somewhat declined, shorter than the j)etals ; capsules 

 (numerous) sessile, ovoid, 4-winged, apiculate or at length 4-loothed at the 

 apex, reticulated. — Nutt.! 771 jour. acad. Philad. 2. p. 118; Hook. hot. 

 mag. t. 2566 ; Bart. fl. N. Arn. t. 37 ,- DC. ! prodr. 3. p. 49. CE. rhizocarpa, 

 Spreng. syst. 2. p. 230 ; DC. I. c. Lavauxia Nuttalliana, Spach! Onagr. 

 p. 38, i!. 31,/. 1. 



Arid plains, Red River, Arkansas, Nuitall! Dr. Piteher! Dr. Leaven- 

 worth! — Leaves large, membranaceous. Flowers smaller than in CE. 

 fruticosa. Tube of the calyx 3-5 inches long, shorter than the radical 

 leaves. Capsules nearly an inch in length, almost ligneous. Seeds slightly 

 ascending, granulose. — The capsules are so numerous and form such large 

 and dense clusters at the surface of the ground, that, according to Nuttall, 

 the growth of the plant is often stifled and it becomes annual : otherwise it 

 is perennial. 



« * « * * Mostly acaulescent caspitose perennial herbs : flowers {very large) 

 radical, erect before expansion, nocturnal, fragrant, fugacious, flesh-colored or 

 white, turning to rose-color: tube of the calyx very long, rather thick, ex. 

 panded at the summit : capsule pedicellate or nearly sessile, cartilaginous or 

 coriaceous, oblong-conic or cylindraceous, ^.ribbed, more or less cristate at the 

 sutures, which are sulcate and often tuberculate, loculicidal: seeds nearly 

 horizontal, arranged in two rows in each cell, oval-obovate, with a austaceous 



