36 PROCEEDINGS OF THE AMERICAN ACADEMY. 
scales nearly or quite as leng as the achene.— Mexico. State of 
Hidalgo: on chalk bluffs of Tula, altitude 2075 m., 20 September, 1902, . 
CO. G. Pringle, no. 11,361 (hb. Gr.). 
The habit and general appearance of G. argyrocarpa is like G. Ber-— 
landieri, Gray, from which, however, it differs by the longer pappus, 
fewer ray-flowers, and by the more densely pubescent achenes. From @. 
ertocarpa, Gray, it differs in having fewer flowers in the head, a merely 
convex not high conical receptacle, and by the strongly appressed 
pubescence of the achene. 
Hrigeron irazuense, n.sp. Suffrutescent: stems erect or ascending, 
1 to 2 dm. high, pilose-pubescent, purplish: leaves spatulate to oblan- 
ceolate, 1 to 3.5 em. long, 3 to 8 mm. broad, apiculate-acute, sparingly 
mucronate-dentate in the upper half, gradually narrowed below the — 
middle to a winged subpetiolar base, pilose-hirsute on both surfaces: 
heads few, 10 to 12 mm. high, terminating the stem and branches on = 
3 em. or less long pubescent peduncles: involucre 2—3-seriate, pubescent} 
bracts of the involucre lance-attenuate, equalling or slightly exceeding | e 
the numerous flowers of the disk, more or less purplish; the outer bracts 
- somewhat shorter than the inner: ray-flowers 3-seriate; rays narrow, = 
white or roseate: achenes pubescent.— Costa Rica. “ Endroits 
humides,” La Playita, altitude, 3300 m., Volean Irazu, 31 January, 1900, 
#. Pittier, no. 14,075 (hb. Gr., and hb. Physico-Geogr. Cost. Ri.). 
Dirrosternrum Scuuttzu, Wedd. Chloris Andina, i. 204. D: a 
rupestre, Klatt, Bull. Soc. Bot. Belg. xxxi, pt. 1, 197, reprint, p. 19, not 
Wedd. The late Professor Klatt referred Pittier’s no. 178, collected om 
the summit of Mount Irazu, Costa Rica, 30 March, 1888, to Diplostephium 
rupestre, Wedd. A careful study of the specimen under this number 
the Gray Herbarium shows that it is identical rather with D. Schultzit, 
Wedd. To this species is also to be referred Pittier’s no. 14,072 (hb. 
Gr., and hb. Inst. Phisico.-Geogr. Cost. Ri.). As far as known to the 
" writer D. Schultzti has not been hitherto recorded from North America® 
TILT Se ee Page est et Ome, hee 
n. sp. Glandular-pubescent throughout: = 
: Saeawer caespitose from a perennial root, erect, 0.5 to 1 m. high, striate 
_ reddish-brown: leaves alternate, sessile, amplexicaul, lanceolate, 5 
ee long, 1 to 1.5 = broad, acute, mucronate-denticulate, dark gree? 
= paler beneath : inflorescence a terminal leafy paniculate cyB@* 
ads of the pistillate plant about 1 em. high with many (100-120) pistil! 
late flowers surrounding 8 to 15 hermaphrodite flowers in the centre of 
. the head; involucre campanulate; bracts of the involucre unequal, 4-5- 
ee ee linear-attenuate, more or less purplish, the outer shorter than the 
SEONG esc 
Fees ee abt oe 
