ROBINSON AND GREENMAN. — GENUS MONTANOA. 515 



gent. — Eiol. Cent.- Am, Bot. ii. IGo. Montagncea frutescens, Mairet in 

 DC. Prodr. V. 5 Go. Aldama Montanoa, Sch. Bip. in Koch, Wochenschr. 

 vii. 406. — Mexico without locality, Mairet, Bates (1846) ; Valley of 

 Mexico, Berlandier, no. 908, Bourgeau, nos. 592 (leaves sometimes 3- 

 lobed), 966, Pringle, no. 7196; Michoacan, cool canons near Patzcuaro, 

 Pringle, nos. 4270, 5059. 



18*. M. ARBOKESCENS, Sch. Bip. 1. c. 406. From description very 

 near the preceding and differing chiefly in the inflexed points of its fruit- 

 ing pales. — Hemsl. 1. c. 164, only in part. M. Jloribunda, Cerv. and 

 Eriocoma arborescens, Alam. ace. to DC. 1. c. Montagnaea arhorescens, 

 DC. Prodr. v. bQb. — Mexico without locality, Alaman, Mairet; Cor- 

 dillera Guchilaqua, Berlandier, no. 1006. 



= = Fruiting pales scarious-papery, rather abruptly contracted to a short 

 more or less spreading point. 



a. Leaves green beneath : Mexican. 



] 9. M. purpurascens. Sordid-tomentose shrub : leaves ovate- 

 rhombic or sometimes hastate, caudate-acuminate, crenate-serrate, more 

 coarsely so toward the base, scabrous above, green but tomentose and 

 often somewhat scabrous beneath, cordate to subcuneate and commonly 

 biauriculate at the insertion of the petiole, 4 to 12 cm. long, 2 to 8 cm. 

 broad ; petioles tomentose, 1 to 2 cm. long : heads rather numerous in an 

 open leafy-bracted corymb: rays 8 to 10, nearly 2 cm. long: fruiting 

 pales turning purple, 1 cm. broad when flattened out. — ■ M. grandijiora, 

 Herasl. 1. c. 165, as to pi. Hartweg. MoniagncBa grandijiora, Benth. PI. 

 Hartw. 19, not DC. — Aguas Calientes, Hartweg, no. 134; canons and 

 hills about Zacatecas, Pringle, nos. 2184, 3985, Rose, no. 3647 ; Guana- 

 juato, Guillemin-Tarayre, Duges, no. 456; Faval, W. Schumann, no. 115. 

 Types in herb. Gray. 



b. Leaves canescent-tomentose beneath : South American. 



20. M. OVALIFOLIA, Sch. Bip. Shrub, 2 to 3 m. high, " subscan- 

 dent," tomentose : leaves deltoid-ovate, 6 to 8 cm. long, three fourths as 

 broad, permanently tomentose upon both surfaces, white beneath, serrate, 

 acuminate: heads on tomentose peduncles (1.5 to 4 cm. long) few or 

 more numerous and disposed in a regularly branched open panicle : rays 

 about 10, from 1.8 to 2 cm. long: pales (still young) with a short sharp 

 straight or often incurved point. — Sch. Bip. in Koch, Wochenschr, vii. 

 407. Montagncea ovalifolia, DC. 1. c. 566. ? Verbesina atriplicifolia, 

 Juss. & Desf. in CoUa, Hort. Rip. 144, t. 31 (but ray depicted as stylif- 

 erous). Montanoa atriplicifolia, Klatt, Leopoldina, xxiii. 90, at least 



