BOTANY. 97 
MACHARANTHERA TANACETIFOLIA, Nees, Ast., p. 224; Gray, Pl. Wright. 1, p. 90. On the Ca- 
nadian, &c. ; September. 
M itcm cci CANESCENS, Gray, Pl. Wright. 1, p. 89. Banks of the Pecos, &c., northwest- 
ern Texas, (smooth varieties) ; gravelly hills near the Colorado of the west; February. 
Aster BIGEUOVII (sp. nov.) : ramis viscido-hirsutis ad apicem usque foliosis; ramulis corym- 
bosis monocephalis ; foliis membranaceis oblongo-lanceolatis semiamplexicaulibus grosse serratis 
tenuiter triplinerviis hirto-puberulis glabratis; capitulis magnis globosis) involueri plurise- 
rialis squamis attenuato-subulatis basi appressis superne longe caudat tis squarroso 
recurvis glanduloso-viscidis ; acheniis glaberrimis. Arroyos in the Sandia mountains ; Octo- 
ber. A wholly new and most remarkable Aster, of the Grandiflori group ; but the apparently 
showy heads larger than those of A. grandiflorus, being an inch in diameter, and the numerous 
(blue and violet) rays an inch long. It is probably a tall plant; but the base of the stem was 
not collected. Cauline leaves two or three inches long, coarsely dentate-serrate throughout ; 
the uppermost, and those of the short branchlets, smaller and less toothed. Scales of the imbri- 
cated involuere half an inch long when extended, very slender; the long and almost filiform 
appendicular portion recurved, spreading and very glandular. Receptacle flat, alveolate ; the 
alveole short and entire. Achenia perfectly glabrous, linear, compressed, three lines long. 
Pappus not abundant, nearly in a single series. 
Aster Novi-Bzran, Linn.; Gray, Pl. Wright. 2, p. 16. Sandia mountains, New Mexico. 
Aster LAEVIS, Linn.; Torr. & Gray, Fl. 2, p. 116. San Antonio, New Mexico; October ; in 
mountain ravines. 
ASTER PATENS, Ait. ; Torr. & Gray, Le On the Canadian, Ze, ; August-September. 
ASTER MULTIFLORUS, 2 Rocky dell, Eastern New Mexico ; September 17. 
AsrER NUTTALLII, Torr. & Gray, Fl. 2, p. 126; var. FENpLERI; folijs rigidioribus hispido- 
ciliatis; involucri squamis granuloso-glandulosis. A. Fendleri, Gray, Pl. Fendl. p. 66 
Rocky ravines and cañons, Llano Estacado ; September. Exactly Fendler's plant; but it ap- 
pears to differ from A. Nuttallii only in its greater rigidity, and the more manifest hispid 
bristles on the branches and the margin of the leaves. 
Aster (OXYTRIPOLIUM) PAUCIFLORUS, Nutt.; Gray, Pl. Wright. 2, p. 16. San Domingo, New 
Mexico ; October.. 
Assen (OXYTRIPOLIUM) DIVARICATUS, Nutt. ; Torr. € Gray, Fl. 2, p. 162. Sand-banks of the 
Canadian ; August. 
ASTER (OXYTRIPOLIUM) ANGUSTUS, Torr. & Gray, l. c. ; Gray, Pl. Wight. 2, p. 76. In wet 
springs, Eastern New Mexico. 
DIPLOPAPPUS ERICOIDES, Torr. € Gray, l. e. Laguna Colorado, New Mexico , September. 
ERIGERON (CANOTUS) DIVARICATUM, Michx., Fl. 2, p. 534. Dogtown prairies ; September. 
ERIGERON (CANOTUS) SUBDECURRENS. Conyza subdecurrens, Gray, Pl. Fendl. p. 78. Plains 
and prairies, Eastern New Mexico; September 21. 
ERIGERON MACRANTHUM, Nutt.; Gray, Pl. Fendl. p. 67. Mountain arroyos, near San An- 
tonio, New Mexico. 
ErIGERON BELLIDIASTRUM, Nutt.; Torr. & Gray, Fl. 2, p. 170. Sand-hills on the Upper 
Canadian ; September. 
ERIGERON PHILADELPHICUM, Linn. ; Torr. Gray, Fl. 2, p. 171. Near Santa Rosa, Benicia, 
and Cocomungo, California ; March-May. 
ERIGERON DIVERGENS, Torr. & Gray, Fl. 2, p. 115; Gray, Pl. Wright. 2, p. TT, (nearly the 
var. CINEREUM.) Hills in the Butte mountains near Marysville, Califoruixa May 25. The 
lower leaves are mostly lobed or almost divided, and the stems become lignescent at the base. 
ERIGERON Doveras, Torr. € Gray, l. c. Hill-sides on the Stanislaus river at Robinson’s 
Ferry, California. Mr. Thurber and others have gathered a very narrow-leaved state of this 
near San Diego. 
ERIGERON MoDESTUM, Gray, Pl. Fendl. p. 68, & Pl. Lindl. 2, p. 220; excl. syn. DC. 
Rocky ravines on the Llano Estacado ; September. 
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