96 UNITED STATES AND MEXICAN BOUNDARY. 
ВАНГА Pepata, Gray, Pl. Wright, 1, p. 123. On the Pecos, Limpia, еіс.; Thurber, Wright. 
BAHIA (AcHYROPAPPUS) BIGELOVII (sp. nov.): annua, striguloso-puberula ; caulibus gracilibus 
diffuse ramosis; foliis oppositis tripartitis, segmentis integerrimis vel inferiorum 2-3-fidis 
lineari-filiformibus ; pedunculis filiformibus monocephalis ; involucri laxi squamis 8-9 oblongo- 
ovatis obtuse acuminatis glanduloso-pubescentibus ; ligulis totidem oblongis; acheniis basi 
hirsutulis ; pappi paleis 8 obovatis obtusissimis enerviis tubo сого] disci viscoso-hispido fere 
dimidio brevioribus, Valley of the Limpio, W. Texas, July, 1852; Bigelow. Stems 
branched from the base a foot or more in height. Leaves short-petioled ; their divisions 6 to 12 
lines long. Peduncles solitary, 3 or 4 inches long. Involucre ‘scarcely 3 lines in length, a 
little shorter than the disk. Flowers yellow; those of the disk as many as 30; their corolla a 
line and a half long ; the slender and glandular-hispid tube abruptly dilated into the cyathiform 
5-lobed limb. Style ав in B. ambrosioides. Achenia linear-clavate, obtusely tetragonal, nearly 
а line and a half long. This is nearly related to the Schkuhria? Neo-Mexicana, Gray, РІ. 
Fendl. p. 96; which, however, is rayless and has disk-corollas scarcely longer than the pappus. 
While on the one hand it is plainly a congener of Achyropappus schkuhrioides, Link & Otto., 
(which in specimens from De Candolle and others, contrary to the generic character, taken from A. 
anthemoides, has a pappus very much shorter than the corolla,) on the other it is equally insepa- 
rable from true Bahia (B. ambrosioides, B. absinthifolia, etc.) I am unable to say exactly how 
the various species are to be divided between Bahia and Schkuhria; but apparently all the 
many flowered ones must be excluded from the latter. 
AMBLYOPAPPUS PUSILLUS, Hook. d: Arn. in Hook. Jour. Bot. 8, p. 321, (vide Gray, Pl. Wright, 
1, p. 123, in adn. & Bot. Whippl. Rep. p. 106.) Infantea Chilensis, Remy, in Gay, Fl. Chil. 
Aromia tenuifolia, Nutt. in Trans. Amer. Phil. Soc. 1, p. 395. Monterey, California, near the 
seaside, forming dense clumps; Parry. 
---- VILLANOVA CHRYSANTHEMOIDES, Gray, Pl. Wright, 2, p. 96. Cobre, New Mexico ; Bigelow, 
Wright. 
SCHKUHRIA HoPKIRKIA, Gray, 1. c. Sonora; Wright. Seeds only were collected, from which 
plants were raised for two seasons. 
_— SCHKUHRIA WRtIGHTII, Gray, l. c. Sandy soil, between Babocomori and Santa Cruz, Sonora ; 
Wright, Thurber. | 
.— ANMBLYOLEPIS SETIGERA, DC.; Gray, l. c. Plains of Texas, from the Leona to the Pecos and 
Eagle Pass ; Bigelow, Wright, Schott. 
RIDDELLIA TAGETINA, Nuit; Torr. in Emory, Rep. t. 5. Texas to Sonora; common on the 
frontier. 
-一 RIDDELLIA ARACHNOIDEA, Gray, Pl. Fendl. p. 94, & Pl. Wright, 1, p. 121. Common on the 
Rio Grande, etc., from the Nueces (where it was also gathered by Berlandier, No 1041, 2471) 
to the Mimbres, etc. 
— HYMENOTHRIK WISLIZENI, Gray, Pi. Fendl. l.c. Mule Springs, etc., New Mexico, and Sonora ; 
Digelow, Wright. 
—— HYMENOTHRIX? УУвшантп, Gray, Pl. Wright, 2, p. 97. Sonora; Wright, Schott, Bigelow, 
Thurber, mostly in the mountains. New Mexico, at the Cobre, Organ mountains, etc.; Bigelow. 
ACTINOLEPIS MULTICAULIS, DC. Prodr. 5, p. 655; Torr. & Gray, Fl. 2, p.316. (Tas. XXXIII.) 
Dana's Ranch, below San Luis Obispo, California; Parry. | 
BURRIELIA LANOSA, Gray, in Bot. Whipp. Hep. p. 101. Sonora, between Tucson and the Gila ; 
Parry. Pappus of 4 long and 4 short paleæ in the disk-flowers, but of five each in the ray. 
