258 New Species of Mexican Plants. [ZOE 
centibus antheris 6 mm. longis in fauce fere sessilibus: stigmate 
2-fido: calycis lobis anguste lanceolatis, inzequalibus, 1 cm. 
longis, tubo longioribus. Fructus ignotus. 
Collected at Corral de las Piedras, near Zacuapan. No. 2424. 
Perezia tomentosa. Caules arachnoideo-tomentosi basi fusco- 
lanati 2-4 dm. alti: foliis imbricatis ovatis acuminatis sessilibus 
argute dentatis, subtus dense albidu-tomentosis, supra arach- 
noideo-tomentosis, 2.5-5 cm. longis, 1.5-2.3 cm. latis: capite 
diametro 3 cm. caules vel ramulos pauces breves terminanti vel 
inter folios superiores sessili: involucri squamis 2-3-seriatis, 
exterioribus tomentosis lineari-lanceolatis acuminatis I-1.5 cm. 
longis: floribus numerosis purpureis: achzeniis resinoso-papillosis. 
The stems are very leafy, especially above the middle, and the 
whole plant is white, with the more or less deciduous tomentum. 
Although this conspicuous plant grows in a region visited by 
many collectors, it does not seem to have been described. Col- 
lected at Esperanza, Puebla. No, 2632. 
Hymenatherum aurantiacum. Caules e radice lignosi, 15 
em. alti: foliis alternis pinuati-partitis, lobis 4-6 linearibus: capi- 
tulis pedunculos 1-1.5 cm. longos terminantibus: involucris tur- 
binatis 5 mm. altis, bracteis connatis 9-14 basi nudatis: ligulis 6 
aureis 4 mm. longis: achzeniis parce villosis: pappi paleis 8-10 
ovato-lanceolatis achzeniis brevioribus, apice in setas 3-5 ina@- 
quales sectis, seta centrali multo longiori: receptaculo conico. 
Collected on Cerro de Santa Lucia, Puebla. No. 2532 
Calea rupestris. Fruticosa fere glabra ramis fuscis striata: 
foliis ovato-acuminatis basi cuneatis penninerviis calloso-denticu- 
latis supra lucidis viridioribus, 4-6 cm. longis, 2-2.5 cm. latis: 
petiolis 5-15 mm. longis: capitulis 20-30, corymbosis ramos 
terminantibus, pedunculis 2-4 cm. longis, ligulis 7-10 flavis 
4 mm. longis; disci floribus circa 25: involucri campanulati 
squamis 4-5-seriatis ovato-oblongis striatis obtusis exterioribus 
gradatim brevioribus: pedicellis 2-3 cm. longis parce pubescenti- 
bus bracteolis lineari-lanceolatis instructis: receptaculo conico: 
paleis oblongis obtusis: achzeniis 3 mm. longis 5 angulatis: pappi 
squamis 7-10 lineari-lanceolatis interdum inxwqualibus achzenils 
brevioribus. 
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