524 BLAKE. 
Discus 5-7 mm. altus 4-6 mm. crassus. Involucri 3-seriati 4 mm. 
alti paullum gradati squamae extimae breviores late ovatae obtusae 
strigillosae vix ciliolatae basi coriaceo-induratae apice herbaceae 
mediae et intimae late oblongae subobtusae minus induratae ciliola- 
tae et strigillosae apice subherbaceae. Radii 8 fertiles flavi ovales 
bidenticulati dorso glanduloso-puberuli 4.5-5.8 mm. longi 2.8 mm. lati. 
Corollae disci flavae in tubo puberulae 3-4.2 mm. longae (tubo 0.6-1.6 
mm.), faucibus valde ampliatis. Paleae subacutae scariosae flavae in 
carina hispidulae margine superne lacerato-dentatae 4.24.6 mm. 
longae. Achaenia brunneo-nigrescentia transverse plus minusve 
rugulosa incrassata submarginata apice rotundata sparse strigillosa 
1.8 mm. longa 1 mm. lata. Pappus fragilissimus ex aristis 2 tenuibus 
spinulosis 2.5 mm. longis et aristulis ca. 12 inaequalibus (longiori- 
bus ad 1 mm. longis) compositus.— GuaTeMaLa: shrubby growth, 
alt. 1311 m., near Coban, Jan. 1879, von Tuerckheim 339 (TYPE COLL.: 
British Museum, Kew).— This number is referred in Robinson & 
Greenman’s revision (Proc. Am. Acad. xxxiv. 526 (1899)) to P. gymno- 
lomioides (Less.) DC., originally described from Vera Cruz, but differs 
in several important features from the description there given of that 
species, which is said to have entire leaves, 3-5-headed corymbs, 
spreading-pubescent pedicels, and much shorter petioles (3 mm. long). 
CHRYSACTINIA acerosa Blake, n. sp. Frutex ramosus pedalis. 
Caulis tenuis brunneo-griseus minute hirtellus aetate glabratus oppo- 
site ramosus. Folia opposita vel superiora alterna filiformi-subulata 
2-4-glanduloso-punctata semiteretia supra complanata apice subulato- 
mucronata glabra laete viridia 6-8 mm. longa 0.25 mm. lata saepius 
ramulos brevissimos foliosissimos subtendentia. Pedunculi ramos 
terminantes monocephali glandulari-hirtelli lineari-subulato-bracteo- 
lati striati ad 1 cm. longi. Capitula (immatura) hemisphaerica 5-6 
mm. alta. Involucri uniseriati 3.5 mm. alti squamae aequales 8 
anguste oblongae (0.8-1.3 mm. latae) membranaceo-chartaceae virl- 
descentes obtusae subcarinatae in margine scarioso sparse e€T0SO- 
ciliatae infra apicem glandula anguste oblonga brunnea praeditae. 
Radii (immaturi) aurei oblongi fertiles. Corollae disci (immaturae) 
aureae in dentibus minute hirtellae 4 mm. longae. Achaenia (imma- 
turissima) pubescentia. Aristae pappi ca. 24 tenues spinulosae 
subaequales ad 3.5 mm. longae.— San Luts Porost: Sierra de Guas- 
cama, Minas de San Rafael, June 1911, Purpus 5136 (TYPE COLL: 
British Museum, Gray Herb., U. S. Nat. Herb.).— Distributed as @ 
narrow-leaved form of C. mexicana Gray, but seemingly quite distinct 
from that species in foliar and involucral characters. 
