ROBINSON. — DIAGNOSES OF TROPICAL AMERICAN PHANEROGAMS. G25 



achaeniis graciliter obconicis tomentellis 2 mm. longis ; pappi squamulis 

 ca. 23 anguste linearibus attenuatis ca. 5 mm. longis scariosis maturi- 

 tate patentibus. — In thickets, British Honduras, Prof. Morton E. 

 Peck, no. 64 (type, in hb. Gray). A species somewhat resembling 

 C. prunifolia HBK., but differing in having smaller leaves, sessile 

 fascicles from the axils of leaf-like bracts, etc. 



Calea scabra (Lag.), n. comb. Calydermos scaber Lag. Gen. et 

 Spec. Nov. 25 (1816) ; DC. Prod. v. 669 (1836). Calea peduncular is, 

 var. epapposa " HBK. Nov. Gen. et Spec. iv. 296, t. 408, f. 5 " ex DC. 

 Prod. v. 669 (1836) ; Robinson & Greenman, Proc. Am. Acad, xxxii. 

 23 (1896). — Foliis ovatis vel ovato-lanceolatis ; achaeniis calvis. 



Var. longifolia (Lag.), n. comb. Calydermos longifoliusL&g. Gen. et 

 Spec. Nov. 25 (1816) ; DC. Prod. v. 669 (1836). Calea peduncular is, 

 var. longifolia Gray, Proc. Am. Acad. xxii. 430 (1887), as to synon. ; 

 Robinson & Greenman, Proc. Am. Acad, xxxii. 23 (1896). — Foliis 

 anguste lanceolati-oblongis elongatis ; achaeniis calvis. 



Var. peduncularis (HBK.), n. comb. Calea peduncularis HBK. Nov. 

 Gen. et Spec. iv. 295, t. 408, f. 1-4 (1820). Calebrachys peduncularis 

 Cass. Diet. Iv. 277 (1828), ace. to Hook. f. & Jack. Ind. Kew. i. 383 

 (1895), but the combination merely implied not actually made by 

 Cassini. — Foliis ovatis vel ovati-lanceolatis ; involucri squamis luteis ; 

 achaeniis papposis. 



Var. livida (Robinson & Greenman), n. comb. Calea peduncularis, 

 var. livida Robinson & Greenman, Proc. Am. Acad, xxxii. 24 (1896). — 

 Foliis lanceolatis vel lanceolati-oblongis ; involucri squamis atropur- 

 pureis ; achaeniis papposis. 



Perezia hebeclada (DC.) Gray, var. urolepis, n. var., capitibus 

 quam ea formae typicae majoribus 2.5 cm. longis ; involucri squamis 

 exterioribus longis conspicue caudato-attenuatis interiores longitudine 

 subaequantibus ; ceteris formae typicae simillima. — Sierra de Pachuca, 

 Hidalgo, Mexico, alt. 2900 m., 10 December, 1907, Pringle, no. 13,975 

 (type, in hb. Gray). 



Perezia nudiuscula, n. sp., gracilis erecta verisimiliter perennis ; 

 caule gracili tereti purpurascenti glabro sparse foliato ; foliis lineari- 

 bus vel lineari-oblanceolatis erectis firmiusculis acutis 2-4 cm. longis 

 2-5 mm. latis glabris patente denticulatis sessilibus basi subamplexi- 

 caulibus ; capitibus ca. 12-floris laxe corymboso-paniculatis 1.5-2.2 

 cm. diametro graciliter pedicellatis ; pedicellis ascendentibus 1-3.5 

 cm. longis saepe bracteolas 1-2 subulatas gerentibus ; involucri squamis 

 valde inaequalibus apice acuminatis et purpurascentibus glabris, interi- 

 oribus lanceolato-oblongis ca. 1 cm. longis, intermediis ovati-lanceolatis 

 brevioribus, extimis brevissimis parvis lanceolatis ; corollis purpureis ; 

 VOL. xliv. — 40 



