TROPICAL AMERICAN EUPATORIEAE. 251 
» A species in many characters near E. pycnocephalum, but quite 
different in its inflorescence. 
E. (§ Subimbricata) Maxonii, spec. nov., frutescens molliter 
lignescens 3-4 m. altum; caule tereti fistuloso fulvide puberulo 
ra ramis oppositis modice patentibus; foliis oppositis ovato- 
suborbicularibus tenuiter membranaceis utrinque viridibus apice brevi- 
ter acuminatis basi subtruncatis vel brevissime acuminatis simplice 
vel plus minusve duplice dentatis lateraliter saepe uni-lobatis vel 
-angulatis basi pinnatinerviis supra basin trinervatis delicatule reti- 
culatis 10-12 cm. longis 8-10 cm. Iatis; petiolis 3-5 cm. longis 
sordide puberulis supra planis vel leviter canaliculatis; capitulis ca. 
26-floris sublaxe corymboso-paniculatis graciliter pedicellatis 1 em. 
longis; involucri anguste campanulati squamis ca. 23 valde inae- 
qualibus dorsaliter minutissime puberulis 3-6-nerviis, exterioribus 
ovato-lanceolatis acutis brevioribus (extimis 1-3 lineari-lanceolatis 
subpatentibus), mediis lanceolatis, interioribus anguste oblongo- 
lanceolatis acutis, intimis linearibus subacutis apicem versus ciliolatis; 
corollis graciliter tubulosis 7 mm. longis apicem versus patenter 
hispidulis aliter glabris verisimiliter albis, faucibus brevissimis ob- 
scuris, limbi dentibus 5 breviter deltoideis patentibus vel recurvatis; 
antheris subliberis apice longiuscule appendiculatis basi subsagittatis; 
achaeniis glabris nigris lucidis 5-costulato-angulatis 1.5 mm. longis 
asi callosis et concavis; pappi setis ca. 40 laete albis delicatule 
capillaribus _plerisque subaequalibus (2 vel 3 brevioribus) minute 
scabratis basi in cupulam connatis; styli ramis longissimis filiformi- 
bus.— Panama: in humid forests in the vicinity of El Boquete, 
Chiriqui, alt. 1000-1300 m., 2-8 March, 1911, William R. Mazon, 
no. 4942 (rype U. S., dupl. Gr.). | 
_ From E. conspicuum Kunth & Bouché, a species somewhat similar 
in its long-petioled, thin, and broadly ovate leaves, E. Maxonii differs 
much in its involucre which is clearly that of § Subimbricata. From 
E. hylobium Robinson it differs in the more spreading dentation of the 
leaves, its longer corollas (7 mm. instead of 4.5 mm.), and considerably 
more numerous florets and pappus-bristles, as well as its slightly 
or and more acute scales. In E. oreshium Robinson, another 
Species of somewhat similar foliage and habit, the heads are smaller 
and less numerously flowered and the corolla has a more enlarged 
throat. - perornatum Klatt of Vera Cruz, likewise somewhat similar 
im habit, has the receptacle hairy and the achenes somewhat hispid, 
while E. prionophyllum Robinson of Costa Rica, which is arboreous, 
more ovate, more gradually acuminate leaves, and glabrous 
corollas about 4.5 mm. long. 
