1914] 
GREENMAN—NORTH AMERICAN ЗЕМЕСТОМЕЮ 977 
November, 1905, C. А. Purpus, 1517 (Мо. Bot. Gard. 
Herb.). State of Puebla, Mt. Orizaba, near Chalchicomula, 
25 February, 1892, Jared G. Smith, 473 (Мо. Bot. Gard. 
Herb.). 
On account of the conspicuous more or less foliaceous bracts 
of the inflorescence S. angulifolius DC. is a very characteristic 
species and is almost always recognized without difficulty. 
There is, however, a considerable variation in the size of the 
heads and in the number of flowers of the disk, as well as in the 
degree of development of the ray-flowers. In fact the latter 
may be well developed, more or less reduced, or entirely absent. 
Тһе extremely large headed form, which is well exemplified by 
the specimens cited above, seems well worthy of varietal rec- 
ognition. Doctor Purpus's No. 1517 is somewhat intermediate 
between the species and the variety. 
Senecio (5 Palmatinervii) brachyanthus Greenm. Monogr. 
Senecio, pt. 1, 26. 1901; in Engl. Bot. Jahrb. 32: 22. 1902, nomen. 
Verisimiliter frutex; caule tereti cortice brunneo tecto juven- 
tate hirtello-puberulento glabrato; foliis longipetiolatis sub- 
peltatis palmatinerviis suborbieularis circiter 7-lobatis mem- 
branaceis utrinque parce hirtellis subtus pallidioribus mucro- 
denticulatis, petiolis usque ad 13 em. longis minute puberulentis; 
inflorescentiis terminalibus subglanduloso-hirtellis; capitulis sub- 
cylindricis 10-12 mm. altis heterogamis; involucri bracteis 8 
lanceolatis 8-10 mm. longis acutis vel obtusis plus minusve 
purpurascentibus extus subglanduloso-hirtellis; flosculis fem- 
ineis 5 multum reductis, ligula nulla, tubo gracili squamis invol- 
ист! breviore; floribus disci 8-10; pappi setis albis; acheniis 
glabris. 
Specimen examined: 
Mexico: State of Guerrero, between Ayusinapa and Petatlan, 
altitude 1540-2155 m., E. W. Nelson, 2137 (Gray Herb. 
апа U. S. Nat. Herb.), ТҮРЕ. 
Тһе leaves and reduced ray-flowers of this species are similar 
to those of S. cordovensis Hemsl., but the character of the 
involucre indicates a closer relationship with S. chapalensis 
Watson. 
Senecio ($ Palmatinervii) chapalensis Watson, Proc. Am. 
Acad. 25: 155. 1890. 
