ASCLEPIADACEJ2. 



381 



base, | to 1 in. long, on short petioles; flowers solitary in the upper 

 axils, and in short cymose clusters at the ends of the branches; 

 corolla pinkish white, subcylindric, 2 lines long or over, its lobes 

 broadly oblong, its tube much exceeding the lanceolate calyx-lobes. — 

 (A. pumilum Greene.) 



Mt. Diablo; base of low hills east of St. Helena; northward to Mt. 

 Shasta. June. The species apparently occurs northward beyond 

 our limits. 



2. A. cannabinum L. Common Indian Hemp. Stems erect. 

 2 to 4 ft. high, rather strict; herbage of a light almost yellowish green, 

 glabrous; leaves oblong-ovate or lanceolate, or the lower oval, ovate, or 

 oblong, sessile or short-petioled; flowers small, in dense terminal 

 cymes; corolla greenish, 1J lines long or less, its segments not sur- 

 passing the calyx-lobes. 



Along stream and river-banks almost everywhere, more common in 

 the interior: Ukiah; Sacramento and San Joaquin Rivers; Amador 

 Co.; Yosemite Valley; Southern California. May-July. 



A. vestitum Greene of " hills west of Napa Valley, in dry soil," 

 said to be allied to this, is described as dwarfish, densely soft-pubescent 

 throughout, with all the leaves ovate-lanceolate and 1 to 2 in. long. 



2. CYCLADENIA Benth. 



Low perennials. Stems simple, several to many from a large fleshy 

 root, bearing 2 or 3 pairs of leaves and 2 or 3 axillary peduncles with 

 2 or 3 rose-purple flowers on slender pedicels. Calyx parted into 5 

 slender lobes. Corolla funnelform with 5 broadly oblong or roundish 

 lobes and 5 minute appendages alternate with the lobes, one behind 

 each stamen. Stamens borne on the tube. Style long and filiform, 

 with a conspicuous membranous ring under the stigma. Disk an 

 entire cup surrounding the base of the ovaries. (Greek kuklos. a 

 ring, and aden, a gland, referring to the disk.) 



1. C. humilis Benth. Three to 6 in. high, glabrous; leaves 

 thickish, ovate or roundish, petioled, 1\ to 2\ in. long; corolla about 

 \ in. long; pedicels about 7 lines long; follicles 3 in. long. 



Mountains of California at about 6,000 ft. altitude: Snow Mt.. 

 Lake Co., Brandegee; Bally Mt. (between Redding and Weaverville), 

 Brewer, no. 1448; Silver Lake, Lassen Co., Baker; Medicine Lake, 

 Siskiyou Co., Baker; San Antonio Mountains, Half; first collected by 

 Hartweg, in 1847, doubtless near Bear Valley, Nevada Co. 



82. ASCLEPIADACE/E. Milkweed Family. 



Herbs with milky juice. Leaves opposite or whorled. Flowers 

 regular, with the stamens and the divisions of the corolla and calyx •">. 

 Pistils 2, with distinct superior ovaries; styles distinct below but 

 united above into a short-cy lindric stylar disk, and surrounded by the 

 stamens which are attached to it. Between each anther, on the sides 

 of the stylar organ, is a cloven gland or elevated ridge slit longitudi- 



