ROBINSON.— ALOMIA, AGERATUM, AND OXYLOBUS. 473 
in apertis silvarum, Cerro de San Isidro prope San Ramon, alt. 1300 
m., Brenes, n. 14,491 (hb. Gray.). 
20. A. TomEeNTosuM (Benth.) Hemsl., herbaceum perenne vel 
suffruticosum basi ramosum; ramis virgatis vel iterum ramosis 
puberulis vel tomentellis; foliis oppositis ovatis vel deltoideis crenatis 
plerisque obtusis basi rotundatis vel truncatis ad insertionem petioli 
plus minusve cuneatis supra saepius viridibus tenuiter pubescentibus 
vel tomentellis subtus canescenti-tomentosis 1.3-3.5 em. longis 1-2.5 
cm. latis margine saepe revolutis; petiolis 5-16 mm. longis; corymbis 
longe pedunculatis convexis densis subsimplicibus vel compositis; 
capitulis ca. 5 mm. diametro; involucri campanulati squamis anguste 
lanceolatis tomentellis viridibus 2-costatis; corollis caeruleo-purpureis 
vel albis plerisque glandulari-atomiferis et apicem versus hispidulis; 
achaeniis atrobrunneis glaberrimis 2 mm. longis; pappo albido coroni- 
formi margine plus minusve angulato vel dentato.— Biol. Cent.-Am. 
Bot. ii. 82 (1881). Coelestina tomentosa Benth. in Oerst. Vidensk. 
Meddel. 1852, p. 71 (1852). Carelia tomentosa (Benth.) Ktze. Rev. 
sine i. 325 (1891).— Costa Rica: Candelaria, alt. 1525 m., Oersted. 
Ex1co: Chiapas, in silvis pinorum, Ghiesbreght, nn. 111, 547 (hb. 
Gray.), forma foliis majusculis; Orizaba, Maltrata, alt. 1680 m., 
Seaton, n. 346 (hb. Gray., hb. U. S. Nat. Mus.); Esperanza, alt. 2440 
m., Seaton, n. 358 (hb. Gray., hb. U.S. Nat. Mus.); Vera Cruz, Linden, 
n. 1185 (hb. Kew., phot. in hb. Gray.); silvis prope Jalapam, Galeotti, 
n. 2202 (hb. Kew., phot. in hb. Gray.); Puebla, in declivibus calcareis, 
Tehuacan, alt. 1700-1800 m., Pringle, n. 6754 (hb. Gray., hb. U. S. 
Nat. Mus., hb. J. D. Sm.), n. 9522 (hb. Gray., hb. U. S. Nat. Mus.), 
Purpus, n. 1179 (hb. Gray.); Zacuapan, in graminosis aridis, Purpus, 
n. 1870 (hb. Gray.). Sierra de la Yerba, Purpus, n. 2547 (hb. Gray., 
hb. U. S. Nat. Mus.), forma receptaculo paleis paucis instructo; 
Oaxaca, Tomellin Cafion, alt. 915 m., Pringle, n. 5786 (hb. Gray.); 
collibus aridis alt. 1550-1775 m., Nelson, n. 1213 (hb. Gray.); Jaya- 
catlan, alt. 1300 m., L. C. Smith, 285 (hb. Gray.); in Monte Alban 
Prope urbem Oaxacam, alt. 1680 m., Pringle, n. 6267 (hb. Gray., hb. 
U.S. Nat. Mus., hb. J. D. Sm.); San Luis Potosi, Minas de San 
Rafael, Purpus, n. 4814 (hb. Gray., hb. U. S. Nat. Mus.). 
SG 
t Nora.— Species foliis et pubescentia variabilis, formis mexicanis a forma 
yPica costaricense minus cognita adhue ut videtur numquam reperta fortasse 
istinguendis, 
21. A. riparium, spec. nov., caule (parte inferiori ignota) superne 
medulloso crassiusculo glabello tactu  laevissimo purpurascenti, 
Mternodiis longis folia superantibus; foliis oppositis crassiusculis 
