112 BOTANY. 
conspicuous.  Corollas yellow, narrowly infundibuilform-tubular, rather deeply 5-toothed at the 
summit, externally callous-thickened, and reticulated at the tip. Stamens, style, &c., as in 
Senecio. Achenia linear, perfectly glabrous, strongly ribbed or angled, fully 3 lines long. 
Pappus soft and fine, white, minutely scabrous. This striking species may perhaps be taken 
for a Cacalia ; but I see nothing to distinguish it from Senecio. There is no North American 
^ with which I can compare it, except S. Frémontii, Torr. & Gray, which has much 
aller and radiate heads. 
HAPLOESTHES GREGGII, Gray, Pl. Fendi. p. 109. Gypsum hills, on the Upper Canadian ; 
September. 
CIRSIUM UNDULATUM, Spreng.; DC.; Torr. & Gray, Fl. 2, p. 456. Plains of the Upper Cana- 
dian to Anton Chico, in the mountains ; September. 
CIRSIUM ALTISSIMUM, Spreng.; Torr. & Gray, l. c. Woods, near Shawneetown; August. 
** Stem 10 feet high.’ 
CrRSIUM CALIFORNICUM (sp. nov.): elatum, ramosum ; foliis caulinis lanceolatis basi sub- 
decurrentibus infra medium sinuato-pinnatifidis denticulatis spinulosis supra glabris vel 
glabratis subtus ramisque arachnoideis ; capitulis longe pedunculatis hemispheericis ; involucro 
ebracteato glabwato, squamis subulato-lanceolatis superne subfoliaceis patulis spinula brevi 
cuspidatis. Hill-sides, near Knight's Ferry, on the Stanislaus, California; May. Only the 
upper part of an apparently tall plant was collected. The largest leaves (upper cauline) are 5 
or 6 inches long, an inch wide, obtusely sinuate-pinnatifid from the middle to the base, the 
summit entire; the upper surface green, sparingly arachnoid when very young, soon glabrous 
and smooth, the lower clothed with a thin and whitish arachnoid wool, not more dense than 
that of C. lanceolatum. Heads solitary, terminating nearly naked branches or peduncles of 5 
to 8 inches long, erect, rather smaller than those of C. lanceolatum. Scales of the involucre 
occupying only about ve series, slightly arachnoid, soon glabrous, smooth ; the coriaceous base 
appressed ; the upper half of all except the innermost spreading, and more or less green, 
narrow, tapering into a small prickle of not more than two lines in length. Flower apparently 
pale purple or pink. Pappus not very copious, 7 lines long. 
ONOPORDON ACANTHIUM, Linn. ? San Francisco; April. The heads undeveloped. 
SILYBRUM MARIANUM, Gertn. Stanislaus River, near Knight's Ferry, California; May. A 
single specimen occurs in the collection ; its ticket has no indication of the plant being other- 
wise than indigenous ; but it was doubtless introduced from the south of Europe. 
PEREZIA NANA, Gray, Pl. Fendl. p. 111, € Pl. Wright. 1, p. 125. Plains, near Laguna 
Colorado, New Mexico ; September. i 
CALAIS MACROCHETA, Gray, Pl. Fendl. p. 112, adn.* San Francisco, California; April. The 
*'T'he recent accessions to this group of plants render the union of Scorzonella, Nutt. and Ptilophora, Gray, Pl. Fendl. l. c., 
with ealais inevitable, as will be seen by the following synoptical view : 
S, DC. Prodr. 7, p. 85, char. auct. 
Capitulum multi- -(rarius pauci)-florum. Involucrum cylindraceum vel campanulatum, aut simplex — calyculatum, aut 
imbricatum pauciseriale. Receptaculum epaleaceum planum. Achenia teretia, 10—14-costata, aut erostria aut sursum rostra 
attenuata. Pappus simplex, e paleis scariosis aristatis 5-10 vel 14-22, aristis scabris barbellatis vel ا ا‎ Herbe America 
Boreali-Occidentalis, scapis ramisve superne longe nudis monocephalis, floribus flavis. 
1. Carocarar, DC. Achenia gracilia, apice attenuata vel breviter rostrata. Pappus (sepissime niveus) e paleis 5 apice 
bifidis ex sinu aristam nudam proferentibus. Involucri squame exteriores breviores. Ligule breves vix e: onocarpi 
— n subcaulescentes. 
1 LINEARIFOLIA, DC. l. c., excl. syn. C. eda DC. 
+ t; LI bobtusis, GC DS, STE gradi ےن‎ tir. 
3. C. Parryi (sp. nov.): scaposa, fere glabra ; linen q 
brevioribus; pappi paleis oblongis apice bifidis arista e sinu exserente barbellato-scabra midi brevioribus. Near San Diego, 
California, Dr. Parry. (Achenia not seen.) 
$2. EucaLars, DC. Achenia breviora, linearia vel oblonga basi attenuata, erostria, apice truncata, extima villosa. Pappus 
(sordidus vel rufidulus) e paleis 5 integris in arístam barbellato-scabram productis. Involucrum basi calyculatum ; squame 
propriz inter se equales. Ligule breviuscule, exserte. Monocarpice, leptorhize, sca 
4. C. Dovetasn, DC. L. c. 
