116 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Porophyllum calcicola, Rob. & Greenm. Annual, glabrous through- 
out: stem erect, usually much-branched, green or purplish, more or less 
glaucous: leaves petiolate, oblong to obovate-subrotund, 0.5 to 3.5 em, 
long, 0.5 to 1.5 cm. broad, obtuse or rounded at the apex, entire to some- 
what sinuate, bearing 3 to several elliptic-oblong marginal glands, cune- 
ate at the base into the slender 0.5 to 2.5 cm. long petioles: heads 
about 1.5 em. high on upwardly enlarged 1 to 3 cm. long peduncles: 
involucre of 5 linear acute bracts about 13 mm. in length, indigo-blue 
or plum-colored: flowers 18 to 20, slightly exceeding the inivolucre ; 
pappus about equalling the slender puberulent greenish corolla-tube ; the 
campanulate limb of the corolla rather deeply 5-lobed, deep purple : ma- 
ture achenes 6 to 7 mm. long, puberulent.— Mexico. State of Guer- 
rero: on limestone ledges of mountains above Iguala, altitude 920 m., 
24 October, 1900, 0. G. Pringle, no. 9059 (hb. Gr.), distributed as “ Por- 
ophyllum Pringlei, Rob.” State of Morelos: on limestone hills near 
Yantepec, altitude 1385 m., 8 November, 1902, C. G. Pringle, no. 8720 
(hb. Gr.). Most nearly related to Porophyllum Pringlei, Rob., but dif- 
fering by the more numerously flowered heads, shorter involucres and 
flowers, more deeply lobed corolla-tube and shorter mature achenes. 
The flowers moreover in P. calcicola are deep purple not white as in P. 
Pringlet. 
Bahia glandulosa. An herbaceous perennial (?), glandular-pubes- 
cent throughout: stem erect, 7 dm. or more high, freely branching 
above, striate: leaves alternate, petiolate, tri- or quaternately compound, 
including the petiole 2 to 12 cm. long, 10 cm. or less broad ; divisions 
linear to linear-oblong, obtuse; the uppermost leaves often reduced to 
individual spatulate-linear or linear-obtuse bracts : inflorescence terminat- 
ing the stem and branches in a many-headed flat-topped corymbose cyme: 
heads 1 cm. or less high, including the rays about 1.5 cm. in diameter : 
involucre of 10 to 14 lance-oblong obtuse uniseriate bracts: ray-flowers 
15 to 20, pale yellow or whitish: disk-flowers numerous: pappus of 10 
to 12 obovate-spatulate and muticus to lanceolate paleo-aristate scales, 
somewhat variable in length: mature achenes about 38 mm. long, puber- 
ulent to essentially glabrous. — Mexico. State of Durango: vicinity ( 
of the City of Durango, April to November, 1896, Dr. Edward Pafker, 7 
no. 492 (hb. Gr.). State of Chihuahua, on hills and plains near the 
City of Chihuahua, 24 October, 1885, C. G. Pringle, no, 308 (hb. Gr.); 
distributed as “ Bahia biternata, Gray.” ca 
A species on the one hand resembling Bahia chrysanthemoides, Gray, 
_ and on the other B. dijternata, Gray. From the former it is distin- 
