COMPOSITA. | 81 
Souta Mexico, Peak of Orizaba, 10,000 to 11,500 feet (Galeotti, 2160; Linden, 489 ; 
Liebmann, 214), alpine region of the Desierto Viejo (Bourgeau, 839). Hb. Kew. 
The decumbent habit and ascending almost leafless flowering-stems readily distinguish 
this from all other species. 
2, Ageratum albidum, Hemsley. 
Celestina albida, DC. Prodr. v. p. 107. 
SoutH Mexico, between Oaxaca and Mitla (Andrieua, 548). Hb. Kew. 
3. Ageratum arbutifolium, H. B. K. Nov. Gen. et Sp. iv. p. 149. 
Phania arbutifolia, DC. Prodr. v. p. 115. 
Sour Mexico, Nauhcampatepetl or Cofre de Perote, 10,200 feet (Humboldt & Bon- 
pland), Popocatepetl, 11,000 feet (Galeotti, 2380), Peak of Orizaba, 9000 to 12,500 feet 
(Linden, 1121; Galeotti, 2159; Liebmann, 213). Hb. Kew. 
4, Ageratum brachystephanum, Regel, Gartenflora, ii. p. 245, t. 108. fig. ¢; 
Steetz in Peters’s Reise n. Mossambique, p. 373, in adnot. 
Ageratum mexicanum, Sweet, Brit. Fl. Gard. i. t. 89, nec Sims, ex Steetz, loc. cit. 
Mexico (ex Sweet).— VENEZUELA ; SAN DomInGo. 
We have followed Steetz in retaining this as a distinct species, though we suspect 
that this, as well as A. mexicanum, Sims, are not more than varieties, at most, of 
A. conyzoides. 
5. Ageratum conyzoides, Linn. Sp. Pl. p. 1175; DC. Prodr. v. p. 108; Steetz 
in Peters’s Mossambique, p. 368; Hook. Exot. Fl. t. 15% 
South Mexico, Mirador and Antigua (Liebmann, 148, 149), valley of Cordova 
(Bourgeau, 1557), Vera Cruz (Linden, 468, 1210), Orizaba (Galeotti, 2222; Bourgeau, 
2684); GuateMaLa, Chojoja, Mazaltenango (Bernoulli, 476); Nicaraeua, Chontales 
(Seemann, 99).—A common weed in nearly all Warm Countrizs. Hb. Kew. 
This should perhaps include A. brachystephanum and A. mexicanum. 
6. Ageratum corymbosum, Zuccag., ex Pers. Syn. ii. p. 402, nec Benth. 
Ageratum celestinum, Sims, Bot. Mag. t. 1730. . 
Sparganophorus ageratoides, Lag. Elench. Hort. Matr. 1815, p. 25. 
Celestina ageratoides, WH. B. K. Nov. Gen. et Sp. iv. p. 151. 
Celestina corymbosa, DC. Prodr. v. p. 108. 
Calestina lessingiana, K1., ex Walp. Rep. ii. p. 545? 
~ Norra Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 315, 
317, 318); Sour Mexico, Real del Monte (Coulter, 247 in part), valley of Mexico 
(Bourgeau, 719; Schaffner, 286), without localities (Parkinson, Tate, Bates, Graham) ; 
GuaTEMALA, Barranca del Incarnacion (Skinner). Hb. Kew. 
7. Ageratum echioides, Hemsley. 
Isocarpha echioides, Less. in Linnea, v. p. 141, t. 2. figg. 14-16 ; DC. Prodr. v. p. 107. 
SoutH Mexico, near Hacienda de la Laguna (Schiede & Deppe), Mirador (Linden, 
BIOL. CENT.-AMER., Bot. Vol. II., Aprid 1881. m 
