ROBINSON AND GREENMAN.—GENUS PERYMENIUM. 529 
25. P. Nelsonii. Shrub with stout subterete branchlets, cinereous 
with copious short appressed or subappressed pubescence: leaves ovate, 
acuminate, serrate, thickish, finely scabrous-pubescent above, pubescent 
or almost tomentose beneath, rounded at the base, 6 to 10 cm. long, half 
as broad: heads large, showy, corymbose; pedicels subrigid, covered 
with grayish subappressed or strigillose pubescence; bracts linear; in- 
volucral scales oblong, rounded at the summit, ciliated : rays 8 or 10, 
oblong, orange-yellow, 1.5 cm. long. — Chiapas, Mexico, EZ. W. Nelson 
at two stations, namely, between San Cristobal and Teopisca, altitude 
2,050 m. to 2,600 m., 4 December, 1895, no. 3465, and between Ocui- 
lapa and Tuxtla, altitude 650 m. to 900 m., 29 August, 1895, no. 3076; 
also at Comitan, 0. & EH. Seler, no. 2970. Types in herb. Gray, herb. 
U. S. Nat. Museum, and herb. Berlin Museum. 
= Petioles 2 to 3 cm. long. 
26. P. Granpe, Hemsl. Shrub, hirsute throughout with spreading 
hairs: leaves ovate- oblong, crenate-sertate, nearly 2 dm. long, acuminate 
at the apex, acute but not attenuate at the base: rays 1.5 to 2 cm. 
long: involucral scales ovate, narrowed to an obtuse apex, pubescent and 
ciliate; heads numerous in an open corymb, showy: achenes frequently 
more or less winged. — Biol. Cent.-Am. Bot. ii. 181. P. Tuerckheimit, 
Klatt, Leopoldina, xx. 95. — Coban, Alta Vera Paz, Guatemala, altitude 
1,300 m., von Tuerckheim, 1879 and 1886 (no. 336 of Mr. J. Donnell 
Smith’s sets). : 
Var. strigillosa. Habit and all technical characters of the species, 
but pubescence of the stem and pedicels minute, appressed, strigillose. — 
Zexmenia fasciculata, Coulter in J. Donnell Smith, Enum. Pl. Guat. pt. 
4, 86, not Gray. — Cenanguilla, Depart. Santa Rosa, Guatemala, altitude 
1,200 m., Heyde & Lux, no. 4244 of Mr. J. Donnell Smith’s sets. Type 
in herb. Gray, 
Exc.Lupep SPECIES. 
P. aLBum, rs Proc. Am. Acad. xxv. 154, is Calea scabrifolia, 
Benth. & Hoo 
The Pereviaa i of Matthews, mentioned by Bentham and Hooker 
(Gen. ii. 377) as probably of this genus, has alternate leaves, sterile ray- 
flowers, and other essential characters of a Viguiera._ 
VOL. xxxry. — 34 
