RYDBERG: SOME SENECIOID GENERA—I ay3 
3. Psacalium Coulteri (Greenm.) Rydb. n. sp. 
Cacalia peltata Coulteri Greenm., Proc. Am. Acad. 40: 51. 
1904. 
I also believe this to be specifically distinct from C. peltata, 
differing in the larger heads with 12-20 flowers and about 12 
villous instead of hirsutulous bracts. The type locality is Real 
del Monte, Veracruz. 
PUEBLA: Purpus 3038. 
Mexico: Rose & Painter 7939. 
MicuoacAn: E. W. Nelson 6582. 
VERACRUZ: Coulier (type). 
4. PSACALIUM THYRSOIDEUM DC. Prodr. 6: 335. 1837. 
Senecio insignis Hemsley, Biol. Cent. Am. Bot. 2: 242. 1881. 
This was described from specimens collected by Haenke in 
Mexico, and has not been rediscovered as far as I know. It is 
known to us only through De Candolle’s short description, 
which does not fit any of the species collected in later years. 
Hemsley referred it to Senecio in which the specific name 
thyrscideum was preoccupied. 
5. PSACALIUM PELTATUM (H.B.K.) Cass. Dict. Sci. Nat. 43: 
461. 1826. 
Cacalia peliaia H.B.K. Nov. Gen. & Sp. 4: 170. 1820. 
Senecio peliuferus Hemsley, Biol. Cent. Am. Bot. 2: 245. 
1881. 
This is the type species of the genus, and was originally 
collected in woods near Patzcuaro, Michoacan. 
MicHoacAn: Humboldt; Pringle 3340; Seler 1259. 
More.os: Pringle 9871. 
6. Psacalium argutum Rydberg sp. nov. 
Stem I m. high or more, striate, finely sip See ee: 
petioles of the "Bet leaves 2-3 dm. long; blades 2-3 oad, 
divided half-way to the center or deeper, strongly reticulate, 
hispidulous on both sides; primary lobes 7 or 8, obovate in out- 
line, usually 5-lobed and the upper lobes again lobed, the ultimate 
divisions lanceolate and acute; sinuses rounded; upper stem- 
leaves silage entire or with a few teeth or lobes, those of 
the inflorescence mostly oblong or lanceolate and entire; heads 
