ROBINSON AND GREENMAN. GENUS GALEA. 29 



ends, callous-denticulate, short-petioled, paler beneath, 3-nerved, 1^- to 2 

 inches long, 9 or 10 Hues broad: heads 2 to 4 at the ends of the branches 

 (springing from the opposite axils of the last pair or two pairs of leaves), 

 half inch in diamt-ter, homogamous : outer involucral scales scarcely 

 shorter than the inner, broadly oblong, rounded at the apex : scales of 

 the pappus linear-attenuate, about 20 in number : achenes glabrous. — 

 Collected by E. W. Nelson, near Choapam, altitude 3,800 to 4,500 feet, 

 28, 29 July, 1894, no. 898. 



^- 4- -(- Doubtful and poorly cliaracterized species, probably referable to this 

 subdivision and very likely synonymous with some of the foregoing species. 



22. C. cacosmioides, Less. " Bracteoles [by which is meant ap- 

 parently the chojf] broad, at the apex laciniate, acuminate and aristate : 

 involucres cylindrical, about 12-flowered: differing from C. solidaginia, 

 Kunth, not only in the form of the bracteoles, but also in the radiate 

 heads, and in the leaves obtuse at the base or acute but not acuminate 

 into petioles, sharply serrate, subglabrous, lucid above." — Liuntea, v. 

 157. — In open places near Jalapa, October, Schiede ^ Dep-pe. The 

 characters translated from the original Latin description. 



23. C. brachiata, DC. "Shrub: branches brachiate : leaves ovate, 

 obtusely mucronate : heads fasciculate and mostly terminal." — Prodr. 

 V. 673 (whence descr.). Mocinna brachiata, Lag. Nov. Gen. 31. Galin- 

 sogea brachiata, Spreng. Syst. iii. 579. — "In Panamaide" ace. to 

 Lagasca, 1. c. 



Subgenus 4. Tetrachyron, Benth. & Hook. f. Heads corymbose, 

 radiate : leaves oblong or lanceolate, often with interpetiolar dilation : 

 both disk- and ray-flowers yellow: scales of the pappus only 4. — Gen. 

 ii. 391. Tetrachyron, Schlecht. Linncea, xix. 744. 



24. C. manicata, Benth. & Hook, f., 1. c. A tall glabrous shrub, 

 8 to 12 feet in height: leaves lanceolate, gradually narrowed at both 

 ends, serrate, 4 or 5 inches long, 9 lines broad, nigrescent in drying: 

 involucres somewhat turbinate-campanulate, ecalyculate: corymbs flat, 2 

 to 6 inches or more in diameter: rays about 12 : scales of the pappus a 

 third to half as long as the achene. — Benth. & Hook. f. ace. to Hemsl. 

 Biol. Cent. -Am. Bot. ii. 206. Tetrachyron manicatum, Schlecht. 1. c. 

 — Cordillera near Vera Cruz, Galeotti, no. 2309 ; Mirador, Liebmann, 

 no. 392, Dr. Berendt, and E. W. Nelson, no. 85 ; Orizaba, Schaffner^ 

 Botteri, no. 807 ; also Sierra del Borrego, above Orizaba, altitude 4,500 

 feet, Pringle, no. 6133. 



25. C. Orizabaensis, Klatt. Branchlets pentagonal : lower leaves 

 petiolate, large, 5 inches long, 3 inches wide, oblong, sinuate-undulate, 



