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108 MISSOURI BOTANICAL GARDEN. 
denticulate and somewhat crisp-ciliate, all but the lowest 
abruptly contracted and sessile, subglaucous, less veiny, 
more rigid, and drying greener than in the last ; flowers erect, 
rosy ; seeds short-beaked. — Monogr. 277. — Coast and in- 
sular region from Alaska to N. E. Asia, according to Hauss- 
knecht, from whose description the characters are taken, as I 
have seen no specimens which I can clearly separate from the 
preceding species. 
35. E. aLPINuUM, L.— Size and habit of Z. Hornemanni, 
but the inflorescence and decurrent lines more nearly 
glabrous; leaves uniformly distributed, thin and delicate, 
pale green, 40 mm. long, subelliptical, rather obtuse, sub- 
entire to somewhat sharply serrulate, gradually narrowed 
to slender petioles; flowers few, suberect in the upper axils; 
petals about 3 mm. long, white or rosy-tipped; capsules very 
slender, erect or ascending, about 50 mm. long, their 
peduncles rather slender and about equalling the subtending 
leaves or stouter and as long as the capsules; seeds smooth, 
gradually attenuated at apex, with very evident beak. — Sp. 
i. (1753), 348, in part.— #. lactifiorum, Haussknecht, 
Oesterr. Bot. Zeitschr. xxix. (1879), 89; Monogr. 158. — 
Canada to Vancouver Island, extending southward in the 
mountains to New Hampshire, Utah, and California( ?) ; also 
in Europe. — Specimens examined from various parts of 
British America (Macoun), the White Mountains, Colorado 
( Coulter, 1873), Utah ( Watson, 1869, no. 394 in part; 
Porter, 1873 ; Jones, 1879, no. 1099 in part), Washington 
(Suksdorf, 1881, no. 10), Oregon ( Howell, 1880, no. 325; 
Henderson, 1890, no. 344), and California? (Mrs. Austin; 
Palmer 1888, nos. 218 and 219).— Occurring with Z. 
Hornemanni, which it closely resembles except for its more 
delicate, pale leaves, smaller white flowers, and smooth 
seeds attenuated to the beak. — Plate 44.* 
*The original alpinum of Linneus included with this Z. Hornemanni 
and £. anagallidifolium. The first-named was separated by Reichenbach 
in 1824; the second, by Lamarck in 1786. Although the name alpinum 
has been applied indiscriminately to all three by many writers, I do not. 
