238 BOTANICAL EXCURSION 
undivided ; the glabrous and narrow-leaved variety of C. seni- 
folia (C. stellata, Nutt.) which alone occurs in this region; 
Melanthium Virginicum, a very handsome plant, with the 
‘flowers cream-flowered when they first expand; and Ste- 
exserta, Ovaria barbata.—Stirpes angustifolie versus sequentem, lati- 
folie ad P. incanum tendentes vel transeuntes ? 
§ 3. Calyx subequaliter dentatus. Verticillastri laxe capituliformes, plerum- 
que terminales, corymboso-paniculati. Bractee floribus breviores, Ovaria 
sepius calva. Folia viz petiolata. 
8. P. Torreyi, (Benth.) ; calyce subzequaliter dentato, dentibus subulatis 
bracteisque pubescenti-canescentibus, foliis lineari-lanceolatis oblongo- 
linearibusve glabriusculis acutis vix serratis basi in petiolum brevissimum 
sensim angustatis, caule stricto pubescente. —P. Virginicum, Nutt. gen. 2, 
p. 33.? 
Has. In Nova Cæsarea, et circa urbem Novum Eboracum, ubi frequens; 
etiam in Carolina Australi, ex Benth. Lab. suppl.—Facies aliquantum 
P. lanceolati, sed facile distinguitur, foliis longioribus (minus rigidis) - 
basi longe attenuatis verticillastris contractis nec capitatis, bracteis ple- 
risque subulatis haud adpressis, dentibus calycis gracilioribus, corolla 
ampliore magis ringente, et staminibus exsertis, 
9. P. pilosum, (Nutt.); calyce subinequaliter dentato, dentibus ovato- 
lanceolatis acutis bracteisque canescenti-villosis, foliis lanceolatis subin- 
tegerrimis basi acutis subsessilibus caule ramisque erectis molliter pube- 
scentibus aut villosis, floralibus nunquam dealbatis.—P. muticum, Benth. 
Lab. p. 329, partim.—Variat. 1, calyce fere zqualiter 5-dentato ; 2, den- 
tibus calycinis 3 superioribus basi manifeste coalitis; et, ni fallor, 
B. Leptodon: calyce fere zqualiter dentato, dentibus longioribus € 
basi lata acuminatis vel subulatis bracteisque (acuminatis) villoso-canis.— 
An species ? 
Has. Incivitatibus occidentalibus, ab Ohio et Tennessee ad Missouriam 
et Arkansam. Var. 8. in comitatu Ashe, Carol. Sept. legimus etiam 
cl. Boykin e Georgia misit.—Species ab P. mutico certissime divers® 
habitu, pubescentia, foliis minus rigidis basi angustatis, dentibus Ca- 
lycis dense villoso-barbatis, etc. Ovaria apice obsolete barbulata. — 
10. P. muticum, (Pers.); calyce æqualiter dentato, dentibus triangular 
ovatis brevibus bracteisque muticis pube brevissima canescentibus, foliis 
rigidis ovatis vel ovatis vel ovato-lanceolatis acutis ssepius serratis v 
rotundatis (nunc subcordatis) sessilibus subpetiolatisve, inferioribus Cau- 
leque laxe paniculato glabris aut tenuiter subtomentosis, summis 
—Brachystemum muticum, Micha. fi, 2, p. 6, f. 32 
muticum, Benth, l. c. partim ? 
