246 bota:nt. 



erect-spreading, bracteate below, with deflexed pedicels ; calyx-lobes ovate, 

 shorter than the corolla ; nutlets compressed, with a single marginal row of 

 barbed prickles, which are connate at base, the dorsal surface granulate and 

 shortly pilose. Var. floeibundum. {E. Jlorihundum, Lehm.) Usually taller 

 (2-4° high) than the European and Siberian form, the leaves acute or obtuse, 

 and the dorsal surface of the nutlets variable, either nearly smooth, especially 

 in the younger fruit as figured in the Flora Bor.-Amer., or pilose, or coarsely 

 granulate with the tubercles often pilose, and frequently with a few scattered 

 imperfectly developed barbed prickles. — The central longitudinal ridge is 

 more or less distinct and the marginal prickles vary in number and breadth. 

 The flowers are either light blue or white, 2-7" in diameter. From New 

 Mexico to the Saskatchewan and west to Northern California and Washington 

 Territory. Frequent in the mountains from the Havallah range to the Wah- 

 satch ; 5-8,000 feet altitude ; May-August. (860.) 



EcHiNOSPEEMUM Redowskii, Lehm. DC. Prodr. 10. 137. Stem erect, 

 pubescent, paniculately branched ; leaves linear or sublanceolate, hoary with 

 spreading hairs ; calyx-lobes narrow-linear, equaling the corolla-tube ; nutlets 

 compressed, surrounded by a single row of barbed prickles, muriculate-rugose 

 upon the back and sides, shorter than the enlarged calyx. Var. occidentale. 

 {E. Redowskii, Gray.) The tubercles, which are irregularly and thickly 

 scattered over the faces of the nutlet, very sharply acute instea,d of rounded- 

 obtuse as in Asiatic specimens. — Quite variable in its habit ; from 3'-2° high, 

 much branched at base and ascending, or with a single erect virgate stem ; 

 leaves and bracts usually linear-oblong, not unfrequently ovate-oblong or spat- 

 ulate, always obtuse ; flowers small, but little exceeding the calyx, blue ; the 

 prickly margin more or less contracted over the back of the nutlet, and the 

 prickles more or less confluent. E. patulum, Lehm., of Western Asia, to 

 which this plant was at first referred, differs from E. Redowskii (as shown by 

 specimens in Herb. Gray.) only in the tuberculations upon the fruit, which 

 in the former species are few in number, arranged regularly in longitudinal 

 rows upon the back and upon the outer edge of the sides, and armed with 

 curved points. The differences are represented with tolerable accuracy in 

 the plate. From Western Texas to Arizona and northward to the Saskat- 

 chewan, Bear Lake and Fort Youkon. Frequent in the valleys and on the 

 mountains from the Sierras to the Wahsatch ; 4-8,000 feet altitude ; May- 

 July. Plate XXIII. Figs. 9, 10. Achenium of E. Redowskii, Var. occideni- 



