482 TRANS. OF THE ACAD. OF SCIENCE. 



seu paucis (raro singulis) pluri-(12-20) vel multi-(20-50) Bo- 

 ris fuscis ; floribus paulo minoribus ; sepalis interioribus bre- 

 vioribus plerumque acutis, exterioribus capsulam longe mu- 

 cronatam sequantibus ; seminibus ut supra. — J. xiphioides, 

 Torr. Bot. Mex. Bound. 222 ; Gray, PI. Hall & Harb. 1. c. 



Var. 6. macranthus : caulibus mediis (sesqui-bipedalibus); 

 vaginis in folia angustiora sensira excurrentibus; capitulis 

 pancis multi-(18-40)floris; floribus majoribus fuscis; sepalis 

 fere aequilongis, interioribus saepe obtusiusculis capsulam acu- 

 tam aequantibus ; seminibus majoribus obovatis abrupte api- 

 culatis. — J. polyceplxalus, a. ex parte, Hook. Fl. B. Am. I.e. 



Var. s. triandrus : caulibus humilibus seu mediis (spitha- 

 meis bipedalibus) ; vaginis in folia angustiora sensim excur- 

 rentibus ; capitulis singulis paucisve multi-(15-30)floris seu 

 pluribus pauci-(5-8)floris paniculatis; floribus majoribus atro- 

 fuscis 3-andris ; sepalis aequilongis seu interioribus obtusi- 

 oribus subbrevioribus capsulam mucronatam sequantibus seu 

 ea brevioribus; seminibus fere ut in var. a. — J. ensifolius, 

 Wickstr. in Act. Holm. 1823, II. 1 ; Kuntb, I.e. 337. 



On tbe Pacific slope of the continent from southern Califor- 

 nia to Unalaschka, extending eastward into the plains east of 

 the Rocky Mountains. Var. a seems peculiar to the fertile 

 lands of the California coast region: Monterey, Haenhe, San 

 Francisco, Bolander, Kellogg, Hb. n. 93, Fort Tejon, JCaritus. 

 Var. /3 has been found on Monte Diablo, near San Francisco, 

 Brewer, Calif. St. Surv. 338. Var. y, the large-headed form in 

 the Rocky Mountains, from Oregon, Spalding, Lyall,to Colo- 

 rado, Hall cb Harb. 564, and N. Mexico, Fendlir, 858, Wright, 

 1925, and into the plains, Saskatchawan, Drumnxond, and Ft. 

 Riley, II. Engelmann; the small-headed form is of more south- 

 ern origin — Arizona, Coues cb Palmer, 70, N.Mexico, Wright, 

 1923 in part, and west Texas, Uncecum. Var. 6 only in Una- 

 laschka, Eschscholtz, on the "North-west coast," Douglas, 

 and in the Cascade Mountains, Lyall , Var. £ from Unalasch- 

 ka, Eschsholtz, Chamisso, Mertens, to the Cascade Moun- 

 tains, Lyall, and the Californian Mountains, Bolander, Hb. 

 n. 94; the panicled form, San Francisco, Bolander. 



This species, the type of the group of Ensifolii, is as vari- 

 able as any of its eastern congeners, and its extreme forms 

 are as widely apart in size of stems and leaves, and of flower- 

 heads, in their inflorescence and even in the number of sta- 

 mens, and transitions between the different varieties are not 

 wanting ; but in flower and fruit they are remarkably uniform. 

 — The flowers are \\ lines long, rarely a little smaller, and 

 only in var. 6 and f larger; the sepals are narrow, the outer 

 ones always long-pointed, but the inner ones quite variable 

 and often shorter; stamens scarcely more than half as long as 

 sepals ; seeds 0.23-0.20 line long and attenuate at least at the 

 lower end, except in var. c5 ; their length is usually equal to 



