ONAGRACEAE (EVENING PRIMROSE FAMILY) 343 



turning green or reddish in age. Stamens 8; anthers versatile, oblong. Style 

 filiforin; stigma capitate. Capsule 4-ceUed, usually linear, 4-angled, often 

 contorted, sessile, dehiscent loculicidally. Seeds in 1 row in each cell.. 



Flowers yellow, sometimes turning red oj: green. 



Capsules straight . . . V . . . 1. S. andinum. 



Capsules more or less curved or contorted. 

 ' Capsules merely curved.less than 2 cm. long . . , . , 2. S. Nelsonii. 



Capsules contorted, 2-3 cm, long 3. S, contortum. 



Flowers white or rose-color, 



Foliage glabrous , . 4. S. tortum. 



Foliage tomentose '. , .,','. .5. S. utahense. , 



, 1. Sphaerostignia andiniun (Nutt.) "Walp. Repert. 2: 70. 1843. Only 

 3-7 cm. high, becoming diffusely branched, cariescenljly puberulent through- 

 out: leaves linear-spatulate, 1-2 cm. long, attenuate into slender petioles: 

 spikes mostly dense, many-flowered, erect; flowers 2 mm. long, yellow; cap- 

 sules 6-12 mm. long; attenuate upward from near the base: seeds linear- 

 oblong, 1 mm.^ long, nearly smooth. — ^From Western Wyoming to Washing- 

 ton and California. 



2. Sphaerostigma Nelsonii Heller, Muhl. 1: 1. 1900. Stems simple or 

 two or more, from the base^ erect, 3-10 cm. high, minutely puberulent or at 

 length glabrous: leaves linear to oblong or broader, entire, 12-25 mm. 

 long, mostly short-petioled : flowers yellowish, minute,' axillary, mostly 

 c'rowded near the end of the stems: calyx-tube very short, about a,s long as 

 the narrowly ovate, dbtusish segments: petals oval with acutish ends, scarcely 

 exceeding the sepals and equaled by the pistil and the longer stamens, about 

 1.5 mm. long: capsule nearly straight, spi-eading or erect, linear, striate at 

 maturity, obscurely puberulent. — Shale cliffs. Green River, Wyoming. 



3. Sphaerostigma contorttun flexuosum A. Nels. Bot. Gaz. 40: 58. 1905. 

 Small, about 1 dm. high; braiiches few, divaricate, ascending, usually a pair 

 near the base: leaves linear: flowers yelloVir;' calyx-tube bbconic: capsule cy- 

 lindrical, sessile, linear, 2-3 cm. long, variously curved, usually defl^xed and 

 again upturned, producing S-shaf)ed forms: seeds smooth. [S. pubens (Wats.) 

 Rydb. as to Fl. Colo.; not S. contortum pubens (Wats.) Small.] — Western 

 Colorado and Wyoming and Utah. 



4. Sphaerostigma tortum (Levi.) A. Nels. 1. c. 60. Branched from the base 

 and spreading, becoming at length nearly prostrate: leaves glabrous, mostly 

 basal, oblanceolate and tapering into slender petioles: capsules about 2 cm. 

 long, cinereous, variously contorted. [S. miriutiflora (Wats.) Rydb. Bull. 

 TolT. Bot. Club 33: 146. 1906.]— Western Wyoming, through Utah and 

 Wyoming to Idaho. 



4a. Spbaeroistigma tortujn Eastwoodae A. Nels. 1. c. 61. Leafy through- 

 out, the leaves oblong-linear: flowers very small: capsule tapering into a slen- 

 der beak, spirally coiled at base.-^Glenwood, Colorado. 



5. Sphaerostigma utahense Small, Bull. Torr. Bot. Club 23: 191. 1896. 

 Whitened with a tomentose pubescence, branbhing from the base upward, 

 15 cm. or more high: leaves ovate, pbovate, or oblanceolate, 2-4 cm; long, 

 generally tapering to a short petiole: flowers crowded in terminal somewhat 

 corymbosb racemes, white: calyx-tube longer than the lanceolate lobes: "petals 

 obovate, 5 mm. long, longer than the stamens but surpassed by the pistil: cap- 

 sule linear, less than 2 cm. long, more or less contorted. — Utah and probably 

 in western Colorado. '< 



14., CHYLISMA ijutt. 



Caulescent annuals with pinnate or simple leaves and yellow flowers in ter- 

 minal racemes. Calyx-tube funnelform or obconic, the limb 4-parted, Petals 

 4, entire. Stamens 8, unequal; anthers oblong, attached hear the 'middle'. 

 Stigma capitate, entire. Capsule linear, subcylindrical or subclavate, obtuse, 

 membranaceous, not sessile. — Oenothera in part. 



1. CHylisma scapoidea (Nutt.) Small, Bull. Torr. Bot. Club 23: 193. 



