EVENING PRIMROSE FAMILY. Onagraceae. 



Sphaerostigma 



tortubsa. 



(Oenothera) 



White 



Spring 



Nevada 



A queer little, stunted-looking, desert 

 plant, with almost no stem, but with 

 several branches, spreading flat on the 

 ground, stiff, smooth and purplish, with 

 crowded clusters of flowers, leaves, and 

 pods, mostly at the ends, the whole 

 forming flat clumps, from six to ten inches across. The 

 leaves are smooth, slightly thickish, pale bluish-green and 

 toothless; the buds are erect, and the flowers are over a 

 quarter of an inch across, white, with yellow anthers and a 

 green stigma. The pods are very much twisted and form 

 odd little snarly bunches. 



There are only a few kinds of Chylisma; the flowers in 

 terminal clusters; the calyx with a more or less funnel- 

 form tube and four lobes; the petals four, not notched; 

 the stamens eight, unequal; the stigma with a round top, 

 the capsule long, membranous, with a stalk. 



A charming desert plant, from a few 

 inches to a foot tall, with one or more, 

 pinkish, smooth, rather leafy stems, 

 springing from a pretty clump of smooth, 

 bluish-green leaves. The delicate flowers 

 are about three-quarters of an inch across 

 and form a graceful cluster of several or 

 many blossoms. The petals are white or 

 yellow, often tinted with pink, with some specks of 

 maroon at the base, and the sepals are pinkish-yellow; the 

 stamens pale yellow; the stigma green; the pods erect. 

 There are several kinds of Pachylophus; perennials, 

 stemless or nearly so; leaves from the root; calyx downy, 

 with a long tube; petals white or pink; stamens eight, with 

 threadlike filaments, the alternate ones longer; style 

 threadlike; stigma four-cleft; capsule woody. 



This has a few large flowers, three inches 

 or more across, with pure-white diaphan 



Chylisma 



Chylisma 



scapoidea var. 



clavaejormis 



(Oenothera) 



White 



Spring 



Ariz., Utah 



White Evening 

 Primrose 



Pachylophus 



marginatus 



(Oenothera) 



White 



Summer 



ous petals, fading to pink, and pink calyx- 

 lobes. The buds are erect, hairy and pink, 

 and the flowers spring from a cluster of lor 

 downy root-leaves, narrowing to slem 

 Ariz Utah Nev leaf -stalks, with hairs on the veins and 

 Col. the toothed and jagged margins, and have 



almost no flower-stalk, but the hairy calyx- 

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