FERNALD, — GENUS PECTIS. 69 
involucre oblong-lanceolate, 6 mm. high, 8-9-flowered, of 3 or 4 oblong 
acute nerveless conduplicate but scarcely keeled bracts: pales 34 or 4 mm. 
long, slightly exceeding the akenes. — Schz. Bip. in Gray, Proc. Am. 
Acad. xix. 45. — Mexico, Valley of Mexico (Schaffner, no. 84). 
** ++ ++ Erect or diffuse : involucre 7-10-bracteate : pappus rufescent, the lacini- 
ate paleaceous bases often splitting away from the setulose awns 
P. Bonplandiana, HBK. Slender, erect or diffuse, dichotomously 
branched: the branches smooth or sparingly pubescent, 2 dm. or less in 
height: leaves linear-lanceolate, mucronate, entire or minutely serrulate 
’ toward the apex, 1 to 2} cm. long, 1 to 3 mm. wide, irregularly dotted 
| beneath, with 1 or 3 pairs of basal setz : heads terminal or axillary, soli- 
_ tary on slender 4-5 bracteate peduncles 2 or 3 cm. long: involucre 4 to 
4} mm. high, about 20-flowered; bracts linear-oblanceolate, acutish or 
blunt, conduplicate, minutely puberulent at the tips, keeled from above 
the middle and bearing a few large glands: rays narrow, 2 mm. long: 
Sitgems of pappus subequal, the longest 2 mm. in length, in the disk 5 or 6, 
in the ray 2, the lanceolate pales slightly laciniate: akenes puberulent, 
3 mm. long. — Nov. Gen. & Spec. iv. 263 ; Less. Linnea, vi. 712; DC. 
_ Prodr. v. 99; Gray, Proc. Am. Acad. xix. 46. P. linearis, Willd. in 
Less. 1. ¢. in syn. P. Seemanni, Gray, |. c. vy. 181, not Schz. Bip. — 
Eastern Mexico. Tamavtipas, “Tampico fide DC. 1. c.; QUERETARO, 
teat Queretaro (Humboldt & Bonpland in HBK. |. c.); Vera Cruz, 
ra near Tantoyuca (Ervendberg, no. 137), Mirador (Liebmann, 
no. 395), 
si Sinaloensis. Diffuse, the branches smooth or hirtellous, } to 4 
dm, long: leaves oblanceolate or obovate-oblong, mucronate, entire, 2 cm. 
or legs long, 2 to 8 mm. wide, sparingly dotted on the pale lower surfaces, 
naked or with 1 or 2 pairs of sete: heads much as in the last but larger, 
on 4~7-bracteate peduncles 3 to 6 cm. (rarely 24 cm.) long: involucre 4 
‘o 5} mm. high, 30-40-flowered ; bracts more pubescent at the tips : rays 
‘or 5 mm. long : pappus much as in the last, 3} to 4 mm. long, the pales 
more deeply laciniate: akenes sparingly appressed-pubescent or glabrate, 
hardly equalling the pappus. — On dry hills, Northwestern Mexico, De- 
cember and January. Sivatoa, Mazatlan (W. G. Wright, no. 1204, 
eae te 313). A specimen collected by pause ioe 
elongs hére, as probably does his no. 1490 from , 
“ted by Hemsley under P. Bonplandiana. 
+ + Pales elliptic, mostly obtuse. 
= Swartziana, Less. Annual, erect, trichotomous above, slender, 
‘mooth, about 3 dm. high: leaves lanceolate or oblong-linear, obtuse or 
