448 PROCEEDINGS OF THE AMERICAN ACADEMY. 
10. A. microcephala (Hemsl.), comb. nov., herba perennis; ramis’ 
virgatis teretibus glabris; foliis oppositis late lanceolatis vel ovato- 
lanceolatis serratis 3-nerviis 5-14 cm. longis 2-4 em. latis firmiusculis 
apice basique acuminatis supra viridibus scabridis vel laevibus subtus 
pallidioribus cum glandulis minutis flavis densissime punctatis omnino 
epilosis; corymbis terminalibus multicapitulatis densis convexis; 
capitulis ca. 6 mm. diametro; involucri campanulati viridis squamis 
lanceolatis attenuatis saepissime 2-costatis glabriusculis vel parce 
glanduloso-atomiferis; paleis apice indurato-subulatis glabris; corollis 
glanduloso-atomiferis, tubo proprio fauces subaequante; achaeniis 
glabris acute 5-angulatis.— Ageratum microcephalum Hemsl. Biol. 
Cent.-Am. Bot. ii. 82, t. 43, ff. 1-5 (1881). Carelia microcephala 
(Hemsl.) Ktze. Rev. Gen. i. 325 (1891).— Mexico: Oaxaca in agris et 
silvis, alt. 2135 m., Galeotti, n. 2098 (hb. Kew., phot. in hb. Gray.); 
prope Choapam, alt. 1170-1380 m., E.. W. Nelson, n. 858 (hb. U.S. 
Nat. Mus., fragm. et icon. simplici in hb. Gray.). 
- 11. A. guatemalensis, spec. nov., herbacea perennis erecta 3 
dm. vel ultra alta; caulibus teretibus brunneo-pupureis gracilibus 
virgatis superne crispe griseo-puberulis basin versus glabratis; inter- 
nodiis perlongis (7-13 cm.) folia superantibus; foliis oppositis lanceo- 
lato-linearibus remote serratis vel integriusculis 3-nerviis utrinque 
obscure et tenuissime pilosis subtus flavido-viridibus glanduloso- 
punctatis 5-8 cm. longis 4-7 mm. latis longe attenuatis basi acutis 
breviter petiolatis; corymbis terminalibus longipedunculatis; densis 
10-20-capitulatis saepius subglobosis, pedicellis ca. 3 mm. longis to- 
mentellis; capitulis5 mm. altis 6 mm. diametro ca. 80-floris; involucri 
campanulati squamis subaequalibus oblongo- vel lineari-lanceolatis 
acutis ciliolatis dorso 2-costatis pilosiusculis; receptaculo conico 
ubique paleifero; paleis angustis apice subulato-acutis pallidis corollas 
subaequantibus; corollis 3.2 mm. longis glabris, tubo proprio fauces 
paullo vel modice ampliatas aequanti; achaeniis nigrescentibus glabris 
lucidis acute angularibus basi callosis apice cum annulo cartilagineo 
humillimo obscure angulato coronatis.— Ageratum salicifolium Coult. 
in J. D.Sm. Enum. Pl. Guat. iv. 72 (1895), non Hemsl.— GUATEMALA: 
Canchén, Depart. Santa Rosa, alt. 610 m., Oct. 1894, Heyde & Lua, 
n. 6153 a cl. J. D. Smithio distributa (hb. Gray., hb. U.S. Nat. Mus. 
hb. J. D. Sm.). e 
12. A. platylepis, spec. nov., verisimiliter herbacea perenns; 
caule tereti primo puberulo maturitate glabrato purpureo folioso; fo-: 
liis majusculis oppositis breviter petiolatis ovato-lanceolatis caudato- 
attenuatis subremote serratis basi rotundatis vel acutatis utrinque 
