284 



ONAGRACE.E. Oaura. 



llorbs, with mostly sessilo altonmlo leaves ; llowoi-s in spikes or lacenies, white or 

 ruso-colored, turning to reil. 



A gcmis (if uhout 2i> Mpeciis, Imlongiiig chiclly to tlio wiuiiior portions of N. Aiiiorica ciist of tlio 

 Rocky ilountuiiis, exteiuling into Mexico. 



1. G. parviflora, Dougl. Auuuul, usually with a dense solt spreading pubes- 

 cence, erect, 1 to 5 I'eet high : leaves ovate to lanceolate, repand-denticulate : liowcrs 

 very small, in ratiier dense strict spikes : petals si)atulate-ol)long, scarcely ungnicu- 

 late, shorter than the calyx-lobes : t'luit 3 to 4 lines long, obscurely 4-angled at the 

 summit, 4-norved, about 2-secded, iudehiscent. — Torr. & Gray, Fl. i. 519; Bot. 

 Mag. t. 350G ; Watson, Lot. King Exp. 113. Schizocarya micrantha, Si)ach, 

 Monog. Onagr. 02. 



Fort Moliuve {Cooper) ; Oregon (Douglas, Ila/l); Salt Lake {IFalsou) ; more common ea.stward 

 from Colonulo to New Mexico and Texas. 



13. HETEROGAUBA, Rothrock. 



Calyx-tube with a short obcouic prolongation above the small ovary ; limb 4-cleft, 

 spreading, deciduous. Petals 4, entire, with claws. Stamens 8 ; hlaments naked ; 

 anthers ovato-conlate, attache*! by tlni base and not versatih) ; those opposite to the 

 petals on shorter lilamunts, lanceolate, acute, sterile. Ovary 4 celled, Avith a solitary 

 poMtluloua ovule in tiach cull: wtylu long: stigma discoid, entire. Kruit nutlikc, 

 indehiscont, obovoid, 2-4-celled, I-2-seeded. — Kothrock, Proc, Am. Acad. vi. 354. 



A single species : a Clarkia in every respect but the fruit and stigma. 

 1. H. Californica, liothr. 1. c Smooth or sparingly puberulent, 1 to 1| feet 

 high : leaves lanceolate, entire, 1 or 2 inches long, tapering to a slender petiole : 

 petals purple, narrowly spatulate, 2 lines long : anthers very small : fruit 2 lines 

 long, obovate, 4 angled, 1^ lines long, smooth, on a short spreading pedicel. — 

 Gaura heterantha, Toirey, Pacif. K. liep. iv. 87. 



In the mountains from Fort Tejon to Placer Co. 



14. CIRC^A, Linn. Enchanter's Nightshade. 



Calyx-tube slightly prolonged above; the ovoid ovary, the base nearly Idled by 

 a cup-shaped disk ; the limb 2-parted, deciduous. Petals 2, obcordate. Stamens 

 2, alternate with the petals; anthers small, nearly round. Ovary 1 - 2-celled : 

 ovule solitary in eacli cell, ascending. Fruit indtdiiscent, pear-shaped, coviuvd with 

 liookeil bristles. — Low slender erect perennial herbs; leaves thin, opposite, petio- 

 late ; flowers small, white, in termiiuil and lateral racemes ; fruit on slender spread- 

 ing or deflexed pedicels. 



A genus of 3 or 4 species, inhabiting cool damp woods throughout the northern portion of the 

 hemisphere. 



1. C. Pacifica, Aschorson I't Magnus. Mostly glabrous: stem usually simple, 

 I to 1 foot higli, from a jxirennial slender running rootstock : leaves ovate, mundod 

 or cordate at base, somewhat acuminate, repandly denticulate, 1 to 2.J inches long; 

 the slender petioles about as long: racemes without bracts: flowers half a line long: 

 calyx white, with a very short tube: fruit a line long, rather loosely covered with 

 soft hairs curved above, 1-celled, 1-seeded. — liot. Zeit. xxix. 392. V. alpina, var. 

 intermedia, Watson, Bot. King Exp. 113. 



In the mountains from Washington Territory to the Yosemite Valley, and eastward to Colorado 

 and the Saskatchewan. Distinguished from C. alpina by its less toothed leaves, and more clearly 

 from C. Lutcliarm by its smaller less ncuminate leaves, smaller flowers, and smaller less bristly 

 1-celled fruit. 



