A. VULGARIS. 87 



77. A. SUBGLABRA Nelson, Bull. Torr. Club 27:36, 1900. — A green variation from A. vulgaris diacohr. 

 The same as A. graveolens of this list. Type locality, stony banks of Yellowstone River, near Yancey's, Yellow- 

 stone Park. 



78. A. 8UK8DORFI Piper, Bull. Torr. Club 28:42, 1901. — A. vulgaris liloralis. The type collection of both 

 is the same. 



79. A. SULCATA Rydberg, N. Am. Fl. 34:270, 1916. — A. vulgaris mexicana. Separated chiefly because of 

 the grooved stems and shining glabrate involucres. The stems are nearly always more or less grooved in 

 mexicana and the pubescence of the involucre is too variable to furnish a good criterion. Type locality, Casas 

 Grandcs, Chihuahua. 



80. A. TENUIS Rydberg, Mem. N. Y. Bot. Card. 1 :431, 1900. — Referred to A. vulgaris discolor. A slender, 

 small-headed form of A. graveolens, which in turn is only a green variation of discolor. The heads are erect. 

 Originally compared with A. lindkyana, but the paniculate inflorescence and the double lobing of at least 

 some of the leaves will serve to distinguish it. Type locality, Emigrant Gulch, Montana. 



81. A. TENUIS INTEGERRIMA Rydberg, 1. c, 432, 1900. — Probably a chance variation of the preceding, with 

 which the type an<l only specimen was collected. Lower leaves wanting, but the upper ones remarkably entire. 

 Type locality, Elmigrant Gulch, Montana. 



82. A. TEXANA Rydberg, N. Am. Fl. 34 : 274, 1916. — A leaf form of A. vulgaris gnaphalodes, differing from the 

 type only in the more deeply cleft foliage. The heads are of minimum size, about 3 mm. high; otherwise very 

 close to the form called A. diversifolia Rydberg. Type locality, Colorado, Texas. 



83. A. TiLESi Ledebour, Mem. Acad. St. Petersb. 5:568, 1805. — A. vulgaris lilesi. 



84. A. TILESI ARCTicA Besser, Hooker, Fl. Bor. Am. 1 :324, 1831. — A form of A. vidgaris tilesi with entire, 

 short, and obtuse leaf-lobes. From the arctic literal of North America. 



85. A. TILESI ELATIOR Torrey and Gray, Fl. N. Am. 2:422, 1843. — A form of A. vulgaris tilesi with the 

 panicle more de\'eloped and far exceeding the leaves. .Apparently the only form from Montana and Oregon 

 to British Columbia, whereas typical lilesi belongs to regions farther north and especially around Bering Sea. 

 But the elongated inflorescence of typical elalior also occurs in the north, for example: Walker 1077 from Chil- 

 kat Valley; 1891 Turner, from Porcupine River; and Blaisdell 80, from Nome. Intermediate forms and specific 

 localities are indicated in the collections cited of subspecies tilesi. Type locality, subarctic America. 



86. A. TILESI UNALASCHENSis Besser, Linnaea 15:106, 1841. — One of the many foliage variations of A. 

 vulgaris tilesi. The main leaves are described as deeply trifid, the lanceolate, acute lobes sparsely and unequally 

 dentate. Type locality. Island of Unalaska. 



87. A. UNALASKENsis Rydberg, N. Am. Fl. 34:266, 1916. — A form of A. vulgaris tilesi; the stems tall and 

 heads in a loose elongated panicle, therefore closely resembling the form here listed as elatior. But it differs 

 from all others in having the lower leaves with approximate divisions and therefore appearing almost palmate, 

 and the leaves exhibit the extreme of dissection. The type is from the island of Unalaska, Macoun (Herb. 

 Geol. Surv. Canada, 20625). The WTiters have seen only a photograph and piece of the type deposited at the 

 New York Botanical Garden Herbarium. 



88. A. UNDERWOODi Rydberg, Bull. Torr. Club 32:129, 1905. — .4. vulgaris ludoviciana. This is a foliage- 

 form, the leaves rather narrower than the average and pinnately parted. Such forms occur throughout most of 

 the range of ludoviciana, but especially in the arid mountains and foothills of Nevada, California, and the 

 Southwest. Some Californian plants referred here by Rydberg are narrow-leaved forms of A. v. heterophylla. 

 Type locality, Ouray, Colo. 



89. A. VULGARIS AMERICANA Bcsser, Linnaea 15:105, 1841. — Two subspecies of A. vidgaris are included in 

 the original description. The former of these, judging from the description and distribution, is equivalent to 

 subspecies tilesi (the form known as elatior) ; the other is subspecies mexicana, as indicated by a portion of the 

 original specimen collected by Engelmann. 



90. A. VULGARIS var. californica Besser, Linnaea 15:91, 1841. — A. vulgaris heterophylla. Besser's name 

 gives the first correct combination according to the International Code, if treated as a variety. Type 

 locality, San Francisco. 



91. A. VULGARIS DOUGL.\siANA Rydberg, N. Am. Fl. 34 : 268, 1916.— As synonjTn. This is an evident slip for 

 A. ludoviciana var. douglasiana, since the former combination does not appear in the publication referred to by 

 Rydberg. 



92. A. VULGARIS var. gnaphalodes 0. Kuntze, Revisio, 309, 1891. — A. vulgaris subspecies gnaphalodes. 



93. A. VULGARIS var. litoralis Suksdorf, Dcuts. Bot. Monats. 18:98, 1900. — A. t;i:^^aris subspecies litoralis. 



94. A. vuLG.^^Ris var. ludoviciana 0. Kuntze, 1. c, 309, 1891. — A. vulgaris ludoviciana. 



95. A. VULGARIS var. mexicana Torrey and Gray, Fl. N. Am. 2 : 421, 1843.— A. vulgaris subspecies mexicana. 



96. A. vuLG.uiis TILESI Ledebour, Fl. Rossica 2:586, 1846. A. vulgaris subspecies tilesi. 



97. A. VULGARIS vuLG.^TissiMA Besser in Hooker, Fl. Bor. Am. 1:322, 1883.— Type specimen not seen; 

 probably to be identified with one of the forms of A. vulgaris tilesi. Type locality. Northwest America. 



98. A. WRiGHTi Gray, Proc. Am. Acad. 19:48, 1883. — A. vidgaris wrighti. 



99. Oligosporus mexicanus Lessing, Syn. Gen. Compos. 264, 1832.— Based upon A. mexicana Willdenow, 

 that is, A. vulgaris mexicana. 



