SYNOPSIS OF THE FLORA OF COLORADO. 15 



CLAYTONIA ARCTICA, Adams., var. MEGARHIZA, Gr. Sill. Jour. 

 (y. 8.} 33, p. 406. Boot fusiform, very large ; leaves T-6' long, 2 // -12 // wide, 

 fleshy ; radical ones petioled, cauline ones lanceolate or linear-lanceo- 

 late, opposite, sessile, racemes secuud, subsessile; flowers large ; petals 

 obovate, subeinarginate, 2 // -6 // long. Flowers from June to August. 

 High alpine, growing in crevices of the rock, its large, purple tap-root 

 penetrating to a great depth. Flowers profuse, white, with pinkish veins. 

 Hall & Harbour, 83 ; Parry, 142. Gray's Peak at 14.000 feet altitude, 

 Coulter ; Redfield. 



CLAYTONIA CHAMISSONIS, Esch. & Ledeb. (C. aquatica, Xutt.) Stems 

 erect or decumbent, stoloniferous and rooting at the joints, becoming 

 1 in length ; roots bulbiferous ; leaves opposite, spatulate, or oblong- 

 obovate, attenuate below, rather obtuse, V-l' long; racemes appar- 

 ently axillary, peduncled, simple, few-flowered ; flowers white, rather 

 large ; petals obovate, entire, twice longer than the calyx. Hall & 

 Harbour, 84; Parry ; Canby ; Meehan ; Brandegee; Coulter. Sangrede 

 Cristo Range, Bedjield. 



EL.ATIIVACE./E. 



ELATIXE AMERICANA, Arn. On the Platte Eiver, Hall & Harbour, 

 59. 



HY'PERICACE^E. 



HYPERICUM SCOULERI, Hook. Perennial, herbaceous ; stems terete 

 below, 6' 2 high ; leaves oblong-obovate, closely sessile or clasping, 

 very obtuse, f long, not dotted, under-surface with numerous prominent 

 veins ; cyme compound ; sepals broadly ovate, rather obtuse. the length 

 of the petals; sepals, petals, and anthers dotted with black; stamens 

 numerous; styles 3, distinct, erect; capsules tricarpellary ; placentae 

 united to the middle. Common. Hall & Harbour, 5S-, Meehan; Canby; 

 Brandegee; Coulter. 



CALLIRRHOE INVOLTJCRATA, Gr. Hirsute ; stem branching, procum- 

 bent, leaves deeply 3-5-parted, covered with stellate hairs, segments 

 linear-lanceolate, laciniately 3-5 toothed; peduncles erect, 1-flow- 

 ered, longer than the leaves; flowers few in a loose panicle, about 1^'in 

 diameter, axillary, scarlet; bracteoles 3, linear-lanceolate, f the length 

 of the deeply-parted calyx; carpels numerous, hairy, not wrinkled. 



Purgatory Eiver, Dr. Bell. Parry, 148. 



SiDALCEA 1 MALVJEFLORA, Gr. Glabrous or hispid, l-3 high, simple ; 

 lower leaves roundish, more or less deeply 7-9 lobed, cauline more nar- 

 rowly and deeply 5-7 lobed, segments linear, somewhat toothed; raceme 

 terminal ; pedicels at first shorter, at length longer than the subulate 

 bracts; calyx hispid or tomentose, the lobes ovate, acute or acuminate; 

 flowers variable in size, l'-2' in diameter, purple, occasionally white; 

 styles 7-8, free at the summit; stigma simple; carpels 7, pointless. 



Middle elevation sin the mountains. Xorth Park, Hay den. South Park, 

 Porter ; Canby; Brandegee. 



1 SIDALCEA, Gray. Bractlets none. Calyx 5, cleft. Stamineal tube double; the outer 

 of 5, the inner of 10 narrower phalanges of stamens. Styles united below, filiform, 

 stigmatose the whole length of the inner face. Ovaries 5-9, united in a circle around 

 a central receptacle. Carpels membranous, beakless. reniform. 1-seeded. indehiscent, 

 separating from the short axis. Seed reniform. ascending. Perennial herbs, with pur- 

 ple, rose-colored or Avhite flowers in paniculate racemes. Gr., Gen. III., 2, p. 57. 



