COMPOSIT A. 83 
SoutH Mexico, fields and woods, at 7000 feet, in the Cordillera of Oaxaca (Galeotti, 
2098). Hb. Kew. | 
The very small flower-heads constitute the most striking character of this species. 
EXPLANATION OF TAB. XLIII. Fiee. 1-5. 
_ Fig. 1, portion of plant, natural size; 2, a flower-head; 3, a floret; 4, style; 5, anther: all 
enlarged. 
14. Ageratum paleaceum, Hemsley. 
Celestina paleacea, Gray, ex DC. Prodr. v. p. 107. 
SoutH Mexico, around Oaxaca (Andrieur, 287). Hb. Kew. | 
15. Ageratum petiolatum, Hemsley. 
Celestina petiolata, Hook. et Arn. Bot. Beech. Voy. p. 433. 
Nicaracua, Realejo (Sinclair). Hb. Kew. 
16. Ageratum salicifolium, Hemsley, n. sp. 
Glabrescens, ramis gracilibus, foliis anguste lanceolatis longe acuminatis integris vel remote den- 
tatis, capitulis multifloris corymbosis, involucri bracteis numerosis angustis acutis rigidis 2-3- 
seriatis, receptaculo nudo leviter conico, corolla subcylindrica puberula, acheniis glabris 
sepissime 4-angulatis basi oblique callosis, pappo brevi cupulato irregulariter 4—5-dentato. 
Suffrutex (vel herba basi lignosa) cito glabrescens, ramis gracilibus, striatulis. Fodia omnia opposita, 
. breviter vel longiuscule petiolata, anguste lanceolata, 2—4-pollicaria, longe acuminata, vix acuta, 
basi cuneata, integra vel remote dentata. Capitula multiflora, pauca, corymbosa; involucri 
bracteze numerose, 2-3-seriate, pilose, anguste, acute, rigide ; receptaculum nudum, leviter 
conicum ; corolla cylindrica, puberula. Achenia glabra, szepissime 4-angulata; pappus brevis, 
cupulatus, irregulariter 4-5-dentatus.—Celestina corymbosa, Benth. Bot. Voy. ‘ Sulphur,’ 
p. 111, pro parte, nec DC. 
SoutH Mexico, San Blas to Tepic (Sinclair). Hb. Kew. 
17. Ageratum scabriusculum, Hemsley. 
Celestina scabriuscula, Benth. in Vidensk. Meddel. 1852, p. 72. 
Celestina corymbosa, Benth. Bot. Voy. ‘Sulphur,’ p. 111, pro parte. 
South Mexico, San Blas to Tepic (Sinclair); GuatemaLa (Friedrichsthal) ; Costa 
Rica (Girsted). Hb. Kew. 
18. Ageratum sessilifolium, Schauer in Linnea, xix. p. 715. 
Mexico (Aschenborn). —— 
19..Ageratum strictum, Hemsley, n. sp. 
Annuum, erectum, strictum, caulibus gracilibus, internodiis longis, foliis lanceolatis calloso-denti- 
culatis supra scabridis subtus glandulis minutis creberrimis instructis, capitulis mediocribus 
multifloris corymbosis, involucri bracteis numerosis linearibus acutis rigidis, receptaculo nudo 
leviter conico, corolla subcylindrica puberula simul parce glandulosa, acheniis glabris szepissime 
4-angulatis, pappo brevi cupulato 4—5-dentato. 
Herba annua, floribus ceruleo-violaceis (fide Galeotti), caulibus erectis, gracilibus, puberulis, pur- 
pureis, internodiis elongatis. Folia omnia opposita, breviter petiolata, lanceolata, 14-2-polli- 
m2 
