474 PROCEEDINGS OF THE AMERICAN ACADEMY. 
ovatis longiuscule acuminatis sed ad apicem verum obtusis basi plus 
minusve angustatis valde inaequalibus et obliquis margine undu- 
latis supra scabriusculis subglabris verucosis subtus paullo pallidiori- 
bus punctatis et breviter praesertim in veniis pilosulis ca. 8 em. longis 
ca. 4 cm. latis; petiolis ca. 1 em. longis; corymbis in caule ramisque 
terminalibus 4—-8-capitulatis densis; capitulis 7 mm. diametro 70- 
floris; involucri campanulati squamis ca. 23 subaequalibus lanceolati- 
linearibus 2-costatis viridibus in linea media (inter costas) ciliatis 
aliter subglabris extimis calloso-obtusis interioribus attenuatis; re- 
ceptaculo conico nudo; corollis albis glaberrimis eglandulosis, tubo 
proprio gracili fauces cylindratas subaequanti; achaeniis nigrescenti- 
bus saepius curvatis glaberrimis vel basin versus in angulis obscure 
hispidulis; pappi corona ad mediam partem 5-lobata, lobis plerisque 
deltoideo-ovatis muticis margine denticulatis.— A. tomentosum Klatt, 
Bull. Soc. Bot. Belg. xxxi. 185 (1892), pro parte, non Hemsl. (a quo 
longe distat).— Costa Rica: in arenosis secundum flumen Ceibo, 
Pittier, n. 4914 (hb. Gray.). | 
Norta.— Haec planta minus cognita (an abnormalis) differt ab A. corymboso 
caule ut videtur herbaceo, foliis basi obliquis, involucri squamis laevioribus 
oo 
extimis calloso-obtusis, corollis glaberrimis, ab A. scabriusculo foliis multo 
“sys apa basi obliquis, corollis albis, characteribus involucri, ab A. tomentoso 
oelo. 
Pe 22. A. corymBosum Zuccag., suffruticosum vel vero fruticosum 
erectum vel saepe decumbens 3-7 dm. altum simplex vel ramosum plus 
minusve griseo-pubescens vel -tomentosum; foliis oppositis vel supre- 
mis alternis firmiusculis ovatis vel rhomboideo-lanceolatis plerisque 
acutis basi rotundatis vel cuneatis margine grosse crenatis vel dentatis 
rarius serratis a basi 3(—5)-nerviis saepe reticulatis 3-6 cm. longis i 
3.5 cm. latis utrinque pallide viridibus supra saepius scabris puberulis 
subtus molliter crispe puberulis vel plus minusve tomentosis; petiolis 
4-8 mm. longis; corymbis in caule ramisque terminalibus saepe pluri- 
bus simplicibus vel compositis multicapitulatis; pedicellis filiformibus 
3-12 mm. longis glandulari-tomentellis; capitulis ca. 7 mm. diametro; 
involucri campanulati vel hemisphaerici squamis lanceolato-linearibus 
attenuatis hispidulis 2-costatis apicem versus saepe coloratis; recep- 
taculo nudo; corollis extus parce glandulari-atomiferis et saep!us plus 
minusve pubescentibus limbum versus caeruleis et vulgo hispidulis, 
tubo proprio gracili fauces paullo ampliatas subaequanti; achaenus 
2.2 mm. longis atrobrunneis vel nigrescentibus glabris; paPP? crater 
formi 0.3 mm. longo albido margine subintegro vel paullo irregulari- mee 
terque dentato.— Zuccag. ex Pers. Syn. ii. 402 (1807). Spargane- pe 
