ROBINSON AND GREENMAN. — TRIXIS. 13 



= = = = Leaves smoothish, finely reticulate-veiny beneath. 



15. T. frutescens, P. Bk. Shrub, much branched, 1 to 1.5 m. 

 high ; braiichlets glabrous or sparingly appressetl-pubescent : leaves uar- 

 rovvly lanceolate to lance-ovate, 3 to 10 cm. long, 1 to 3.5 cm. broad, 

 more or less acuminate and mucronate, subentire to distinctly dentate, 

 sessile or narrowed into a subpetiolate base, glabrous or nearly so on 

 both surfaces: inflorescence a many-headed somewhat leafy corymbose 

 panicle; heads 1.5 to 2 cm. high, usually about 12-flovvei'ed ; inner iuvo- 

 lucral scales 8 (or rarely 10) in number, 10 to 12 mm. long, the outer 

 linear or lance-hnear, usually half to two-thirds as long as the inner, 

 rarely quite as long. — P. Br. ace. to Spreng. Syst. iii. 501 (182G) ; DC. 

 Prodr. vii. pt. 1, 68; Hemsl. I.e. 258; Less. Linnaea, v. 33; Benth. PI. 

 Hartw. 88; Klatt, Bull. Soc. Bot. Belg. xxxv. pt. 1, 293. T. radiale, 

 Lag. ace. Hook. f. & Jacks. Ind. Kew. li. 1131, but Lagasca seems 

 never to have employed the combination, although he referred the Lin- 

 naean species to IVixis, as had P. Browne many years before (Hist. 

 Jam. 312). T. laevigata, Lag. ace. to Spreng. Syst. iii. 501 (1826). 

 T. divaricata, Klatt, Bull. Soc. Bot. Belg. xxxi. pt. 1, 215 (1892) not 

 ^^VQwg. Perdiciurn radiale, L. Sp. ed. 2, 1248 (1763) ; Lag. Amen. Nat. 

 i. 36; Lam. 111. t. 677, f. 2. P. laengatum, Berg. Act. Holm. 228, t. 7 

 (1772); Lam. Diet. v. 179, & 111. t. 677, f. 1. Inida Trixis, L. Amoen. 

 Acad. V. 406 (1760). Tenorea Berteri, CoUa, Hort. Ripul. 137 (1824). 

 T. calyculata, Bert. ace. to Colla, 1. c. Prenantkes fruticosa, Willd. ace. 

 to Less. Linnaea, v. 33 (1830) & DC. Prodr. vii. pt. 1, 69. — Tamau- 

 LIPAS : near Matamora.*', Berlandier, nos. 690, 2100 (both in hb. Gr.), and 

 near Victoria, Berlandier, uos. 810, 2230 (both in hb. Gr.) ; near Jimenez, 

 Nelson, no. 6660 (hb. Gr., hb. U. S. Nat. Mus ). The last five num- 

 bers represent a form with the outer accessory involucral bracts equal- 

 ling the inner proper involucre. San Luis Potosi : alt. 1850 to 

 2500 m., Parry Sf Palmer, no. 550 (hb. Gr.) ; limestone hills, Las Pal- 

 mas, alt. 120 to 160 m., Pringle, nos. 5766, 8005 (both in hb. Gr.). 

 Tepic : Santiago and Tepic, Lamb, no. 552. Vera Cruz: Valley of 

 Cordova, Boicrgeau, no. 2035 (hb. Gr.) ; Mirador, Sartorius (hb. Gr.) ; 

 near the city of Vera Cruz, Pringle, no. 5771 (hb. Gr.), Linden, no. 

 1208 (hb. Gr.). Oaxaca : between San Carlos and San Bartolo, alt. 

 1000 to 1500 m.. Nelson, no. 2567 (hb. Gr.) ; on wooded slopes of the 

 Tehuan tepee below Tolopan, growing under trees, C. Sf E. Seler, no. 

 1702 (hb. Gr.). Chiapas: between Tonala and Tuxtla in mountain 

 woods near Cuesta San Fernando, C. Sf E. Seler, no. 1932 (hb. Gr.) : 



