284 BALORAGBAE. 



June. Var. cruciata Wats, has narrowly obovate or oblong petals one-half as 

 large. 



Gayophytum Juss., approaches Oenothera; very slender annuals; flowers 

 small, white or pink; ovary 2-celled. — The following grow in the Sierra 

 Nevada. G-. lasiospermum Greene; flowers small, the petals about % line 

 Long; seeds canescent with appressed hairs (as also in next). G. eriosper- 

 mum Coville; flowers large, iy 2 to 3 lines long. G. BAMOSISSIMUM T. & G.; 

 much-forked above, mostly remotely leafy; pedicels filiform, elongated; petals 

 1% to 3 lines long; stigma rather small; capsule subclavate, mostly torulose; 

 seeds glabrous (as in all the following), rather few, large, papillate, mostly 

 dark colored. — A common species. G. diffusum T. & G. ; like preceding but 

 small-flowered, the petals */> to 1 line long. G. pumilum Wats.; low, simple or 

 paniculately few-branched toward the base, densely leafy; pedicels short or 

 nearly none; petals y 2 line long; stigma large, capitate; capsule neither 

 clavate nor conspicuously torulose; seeds numerous, smooth. 



10. CIRCAEA L. Enchanter's Nightshade. 



Low slender perennials with thin opposite petioled leaves. Flowers small, 

 white, in terminal and lateral racemes. Calyx-tube slightly produced beyond 

 the ovary, the base nearly filled by a cup-shaped disk, deciduous; lobes 

 2, reflexed. Petals 2, obcordate. Stamens 2, alternate with the petals. Ovary 

 1 or 2-celled, each cell 1-ovuled. Fruit 1-celled, 1-seeded, indehiscent, pear- 

 shaped and bristly with hooked hairs. (Circe, sea-nymph, daughter of the 

 Sun and of Perse.) 



1. C. pacifica Asch. & Mag. Stem from a short rootstock, usually simple, 

 6 to 14 in. high; herbage glabrous; leaves orbicular to mostly ovate, obtuse to 

 cordate at base, acuminate, obscurely repand-denticulate or almost entire. 1 

 to 2 in. long, on petioles % to 1 in. long; racemes bractless; flowers L, line 

 long; calyx white, with a very short tube; fruit % to 1 line long. 



Deep shades of woods: Olema Creek, Marin Co., Eastwood (Ervthea, 

 vi, 117); Cahto (Mendocino Co.) to Mt. Shasta, thence southward in the 

 Sierra Nevada at middle altitudes. Infrequent, duly. 



HALORAGEAE. Water-millfoil Family. 



Perennial aquatic herbs, the leaves (in ours) in whorls. Flowers sessde in 

 the axils of leaves or bracts, perfect or unisexual. Calyx-tube coherent with 

 the ovary, the limb very short or obsolete. Petals small or none. Stamens 

 1, 4, or 8. Ovary 1 to 4-celled; stigmas 1 to 4. Fruit a 1-seeded indehiscent 

 nutlet, or 4-lobed and splitting into 4 nutlets. 



Leaves all entire; flowers perfect; stamen 1; ovary 1-celled 1. HlPPURlS. 



Immersed leaves capillary dissected; flowers polygamous; stamens 4 or 8; ovary 4-celled... 



J. MvKionivi.i.r.M. 



1. HIPPURIS L. Make's Tail. 



Stems erect, unbranched. Leaves simple, entire. Flowers minute, usually 

 perfect, sessile in the axils. Petals none. Calyx limb a narrow entire rim. 

 Stamen 1, insert ed on the anterior edge of the calyx. Style 1, filiform, stig- 

 matic down one side. Ovary 1-celled, becoming a 1-seeded nutlet. (Greek 

 hippos, a horse, and oura, a tail.) 



1. H. vulgaris L. Stem simple. 1 to 2 ft. long (commonly emersed 4 to 7 

 in.); herbage glabrous; Leaves about 7 to in in a whorl, linear, acute. •._. in. 

 Long ; fruit nearly 1 line hm^. 



