272 FIELD COLUMBIAN MUSEUM BOTANY, VOL. II. 



with dark brown or blackish nerves: disk-flowers 20 to 25: 

 mature achenes of the fertile flowers linear, 12 mm. or less in 

 length, erect or somewhat recurved, 2-4-awned with relatively 

 short retrorsely barbed persistent pappus-awns, striate, 2-4- 

 angled in cross-section, ciliate along the angles otherwise glabrous. 

 PORTO Rico. On slopes of Mt. Montoso, near Maricao, 23 

 November, 1884. Sintenis, no. 387 (hb. Field Mus. Catalogue 

 No. 79397), type. MEXICO. State of Campeche: Apazote, near 

 Yohaltun, 20 December, 1900, E. A. Goldman, no. 468 (hb. U. S. 

 Nat. Mus.; fragment and photograph in hb. Field Mus.). 



This species has its affinity with a small natural group of 

 plants to which B. rubifolia HBK, B. tereticaulis and B. coreopsidis 

 DC. belong, but the smooth or lineate-puberulent stem and 

 branches, the pinnatisect leaves with their numerous narrow 

 divisions, the nature of the pubescence, and certain technical 

 characters of the head seem to the writer to warrant its specific 

 rank. B. Urbanii is apparently most closely allied to B. Coreop- 

 sidis, var. (?) incisa DC. v. 599 (1836) (Coreopsis incisa Ker- 

 Gawl. Bot. Reg. t. 7), but here again a careful comparison with 

 the original description and illustration shows several important 

 differences. 



CALEA PRINGLEI Rob., var. rubida Greenman, var. nov. 



Leaves short-petiolate, ovate, 1.5 to 3 cm. long, two-thirds 

 as broad, densely tomentose beneath; petioles 2 to 4 mm. 

 long, tawny-pubescent: involucral bracts elliptic-oblong, red- 

 dish-margined. MEXICO. State of Vera Cruz: on hillsides 

 near Chavarillo, 7 September, 1906, C. R. Barnes, C.J. Chamberlain 

 & W. J. G. Land, no. 4 (hb. Field Mus., and hb. University of 

 Chicago). Differs from the type of the species chiefly in the 

 short but distinctly petioled leaves, and by the slightly narrower 

 and reddish-margined involucral bracts. 



Florestina Liebmannii Schz. Bip., in herb. 



Stem erect or somewhat ascending from an indurated base, 3 

 to 5 dm. high, simple or sparingly branched, terete below, 

 striate-angled above, substrigillose and more or less closely 

 beset with stipitate glands: lower leaves opposite, simple, 

 petiolate, narrowly lanceolate-oblong, 2 to 3.5 cm. long, 4 to 

 12 mm. broad, obtuse or acute, entire or occasionally few-dentate, 

 obtuse at the base, substrigose-hispid on both surfaces, 3-nerved; 

 petioles 0.5 to 1.5 cm. long, hispid-pubescent intermixed with 

 stipitate-glandular hairs; the upper stem-leaves alternate and 

 gradually reduced to linear bracts: inflorescence terminating 

 the stem in a glandular-pubescent subcorymbose cyme: heads 

 homogamous, 8 to 10 mm. high: involucre subturbinate ; bracts of 

 the involucre 8, uniseriate or essentially so, elliptic-oblong to 

 obovate-oblong, 4 to 5 mm. long, 2 to 3 mm. broad, rounded at 

 the apex, scarious-margined and more or less erose-ciliate, ap- 

 pressed-puberulent on the outer surface : flowers 12 to 14: pappus 

 of 8 obovate or broadly spatulate hyaline-scarious pointless 



