460 PROCEEDINGS OF THE AMERICAN ACADEMY. 
lower leaves entire, lance-linear, acute at both ends, 4 to 5.5 em. long, 
4 to 5 mm. broad, the middle cauline leaves deeply and pinnately 3-cleft 
into linear acute segments, finely pubescent above, flocculent-sericeous 
beneath : peduncles filiform, springing from the forks, 2 to 5 em. long: 
heads 1.2 to 1.4 cm. broad (including the rather numerous well-exserted 
narrow bright yellow ligules): fruit tuberculate, the hood well developed 
and passing gradually and without intermediate toothing into a long 
slender spirally coiled appendage. — Jalisco, Mexico, on dry hillsides 
near Tequila, Dr. Edward Palmer, no. 391 (coll. of 1886), 0. G: 
Pringle, no. 4598. Type in herb. Gray. This plant although in habit 
identical with IZ heterophyllum, Lag., is strictly herbaceous and annual. 
This fact, together with the hooded and appendaged fruit, seems to wal 
rant its separation. It is certainly distinct from MZ. sericeum, Lag. 
++ ++ ++ Leaves undivided. 
13. M. Kounratanvm, DC. Prodr. v. 519 (1836). IM. sericewm, HBK. 
Nov. Gen. & Spec. iv. 272, t. 398 (1820), not Lag. — Of this species I 
have seen only asingle and imperfect specimen in the De Candollean 
Herbarium. The leaves are linear, or nearly so, and entire; the fruit 1s 
provided with a well-developed hood but no appendage. This species 
also exhibits a suspicious resemblance to M. heterophyllum, Lag., and it 
may represent Lagasca’s var. B. 
Ps 14. M. pirrusum, Cass. Dict. lix. 238 (1829). MM. manillense, Less 
Linnaea, vi. 155 (1831). After examining authentic material of this 
species in the Prodromus herbarium I can confidently refer to it Dr. 
Palmer’s nos. 8 and 281 from Acapulco, Mexico (coll. of 1895). The 
species has been hitherto recorded only from the Island of Luzon. As 
the genus as a whole is American, and as this species is now found to be 
also an American plant, its occurrence in the Philippines may very likely 
be due to introduction. At all events it seems from the distribution 
of the other species more likely that this plant has been carried from 
Mexico to the Philippines, than the reverse. 
Var. lanceolatum. J. lanceolatum, DC. Prodr. v. 519 (1836). — 
Fruit with a short hood but no appendage ; otherwise closely like hex 
typical form. — Collected by Nee, but the locality unknown. Nee visited 
both Acapulco, Mexico, and the Philippine Islands. i 
§ 2. Zarapettia, DC. Fructiferous bracts not exceeding the 
closed achenes, nor developed into a cup, hood, or appendage at the 
summit. — Prodr. v. 519 (1836). Zarabellia, Cass. Dict. lix. 240. 
* Peduncles long and slender: ligules well exserted, conspicuous. 
+ Leaves sericeous beneath. 
hig ea 
