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 cm. 

 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 cm. 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 involucre; 

 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, C. 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, O. 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 deejily lobed corolla-tube and shorter mature achenes. 

 The flowers moreover in P. calcicola are deep purple not white as in P. 

 Pringlei. 



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 3 mm. long, puber- 

 ulent to essentially glabrous. — Mexico. State of Durango : vicinity 

 of the City of Durango, April to November, 1896, Dr. Edward Parker, 

 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." 



A species on the one hand resembling Bahia chrysanthemoides, Gray, 

 and on the other B. biternata, Gray. From the former it is distin- 



