U M B E L L I F E R M. 315 



was founded, in the lobes of the leaves being rather obtuse, the 

 primary rays of the umbel shorter, and the umbellets 8-10-flowered ; 

 thus approaching S. graveolens of Chili more closely than does the 

 ordinary variety. 



4. ERYNGIUM, Tburn. 



1. Eryngium petiolatum, Hook. 



E. caule superne dichoiomo; foliis radicalibus obJongo-lanceolatis grosse 

 serrato-dentatis, deniiculis spinosis vel pilifei'is, petiolis longissimis fis- 

 tulosis septiferis, caidinis sessilibus, supremis tripartitis spinosis, in- 

 volucralibus paleisve pinnatifido- vel tricuspid ato-spinosis capitulo 

 subgloboso Jongioribus. 



Eryngium petiolatum, Hook. Fl. Bor.-Am. 1, p. 259 ; Torr. & Gray, Fl. 1, p. 604. 

 E. articulatam, Hook. Lond. Jour. Bot. 6, p. 232. 



Hab. On the Spokane Kiver, Washington Territory. Also on the 

 Willamette River, Oregon, and southward to the Lower Sacramento, 

 California. — Variable in size, but often 3 to 5 feet high, the upper part 

 dichotomously much branched; the stem and branches striate. Some- 

 times the plant is a few inches high, and branching from the base. 

 The radical leaves are often destitute of lamina, and then consist of 

 terete petioles which are 12-18 inches long and as thick as a goose- 

 quill. They have a jointed appearance from the nodes which occur 

 at intervals of an inch or more. Even when the lamina is present, 

 the petioles have the same structure, except that the nodes are much 

 more approximated. The primary veins mostly originate at the base 

 of the lamina, and run nearly parallel towards the summit. The 

 heads (including the projecting spiny scales) are about three-fourths 

 of an inch in diameter, and are often of a bluish color. Sometimes 

 only the scales of the terminal flowers are elongated. Calyx-tube 

 covered with ovate acute scales. — A remarkable species, varying con- 

 siderably according to soil and situation. I have no hesitation in 

 joining with it E. articidatum of Hooker, so well described by him in 



