s/ 



128 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 30 Ser. 



septicidal; sepals often hairy or subglandular, or spotted within; seeds 

 ascending and somewhat turgid, with white, loose and spongy, minutely 

 tesselated testa. 



Group I. Oregon Mariposas. 



Capsule with thin, acute or winged cells (as in Section I, but erect), also 

 resembling Section I in the solitary, flat, shining leaf. Closely linked to the 

 preceding group of Eucalochorti (Giant Star Tulips). Oregon and to the 

 northeast. 



* Petals tvith an indigo blotch in the center. 



17. Calochortus nitidus Dougl. 



Calochortus nitidus Douglas, Trans. Hort. Soc, Vol. VII, 1830, p. 277, 

 Tab. IX, fig. a. 



Stem bulbiferous near the base, slender, stiffly erect, not bracted in the 

 middle, bearing an umbel of 2-4 flowers subtended by 2-4 linear bracts; ped- 

 icels often 3 inches long; sepals ovate-lanceolate, long-acuminate, exceeding 

 petals; petals white to lavender, a conspicuous indigo spot in the middle, 

 2 inches long, the same in width, broadly cuneate, rounded above, with a 

 small rounded gland densely matted with short hairs, and scattering long 

 hairs around and above; filaments filiform, winged below; anthers linear- 

 oblong, two-thirds as long as filaments; capsule elliptical-orbicular, strongly 

 winged and crested. 



Described from specimens from Union, Oregon. 



"Columbia britannica" (Dougl.) ; "Oregon" (Spaulding). 



This species is the largest flowered of the group; it is 

 found in wet fields, from eastern Oregon through Idaho to 

 Montana and northeastern Nevada. Specimens from Yel- 

 lowstone Lake are yellow. The purple blotch on the petal 

 seems to be distinctive. 



** Petals not spotted in the middle; flowers lilac, smaller than in the preceding. 



18. Calochortus greenei Watson. 



Calochorttis greeneiW^-TSOti, Proc. Amer. Acad., Vol. XIV, 1879, p. 264. 



Stem stout, branching, often a foot high or more, 2-5-flowered; leaf about 

 equalling the stem, an inch broad; bracts narrow, elongated; sepals greenish 

 with more or less of lilac within, and with a yellowish hairy spot above the 

 base; petals broadly fan-shaped and obtuse, 1% to 1% inches long, lilac, 

 somewhat barred with yellow below, strongly pitted and arched, the lower 

 part densely covered with very long yellow hairs, upper part of the blade 

 more thinly hairy, not ciliate; pit densely villous above a broad transverse, 

 laciniate scale; anthers broad, acute or obtuse, % inch long; capsule an inch 

 long, 4 to 6 lines broad, attenuate into a stout beak. 



