78 COMPOSIT A. 
4, Piqueria trinervia, Cav. Ic. iii. p. 19, t. 235; Bot. Mag. t. 2650. 
Nortu Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 314) ; 
South Mexico, Real del Monte (Coulter, 721), Cerro de Bafios (Bourgeau, 144); 
Yavesia (Liebmann, 110), cultivated fields near Mexico (Bourgeau, 1402), San Blas to 
Tepic (Sinclair), Zimapan to Real del Monte (Couléer, 263), Tacubaya (Bilimek, 578), 
without localities (Tate, Graham, Sallé). Hb. Kew. 
11. PHANTA. 
Phania, DC. Prodr. v. p. 114; Benth. et Hook. Gen. Plant. ii. p. 238. 
Three West-Indian species, and the following doubtful one :— 
1. Phania trinervia, DC. Prodr. v. p. 115; Calques des Dess. Fl. Mex. 527. 
Mexico (Mogino & Sessé). 
Possibly the same as Ageratum arbutifolium. 
12. DECACH ATA. 
Decacheta, DC. Prodr. v. p. 183; Benth. et Hook. Gen. Plant. ii. p. 238. 
Limited to the Mexican species, which are undershrubs. 
1. Decacheta henkeana, DC. Prodr. v. p. 133; Deless. Ic. Sel. iv. t. 13. 
South Mexico, Gualulu, San Miguel (Liebmann, 47), Tepic (Barclay). Hb. Kew. 
2. Decacheta seemannii, Benth. et Hook. Gen. Plant. ii. p. 239; Hemsley, 
Diag. Pl. Nov. pars altera, p. 33. (Tab. XLII.) 
Ageratum microphyllum, Schz. Bip. in Seem. Bot. Voy. ‘ Herald,’ p. 298. 
Suffruticosa, ramosa, ramis gracilibus junioribus puberulis, foliis parvis obovato-spathulatis vel 
interdum fere ovatis inciso-crenatis, capitulis 6-12-floris, involucri bracteis obtusis, pappi 
paleis 5 longe aristatis. | 
Frutexr nana, ramosa, ramis teretibus, gracilibus, junioribus puberulis. Folia opposita vel superiora 
alterna, petiolata, herbacea, ovata usque obovato-spathulata vel fere rotundata, 3-6 lin. longa, 
puberula, venis subtus sepe prominentibus, petiolo brevissimo. Capitula 6-12-flora, sessilia 
vel breviter pedunculata, secus pedunculos communes terminales elongatos disposita ; involucri 
bracteze oblonge, obtusiuscule, glabre; pappi pale sepissime 5, longe barbato-aristatz, ac 
corolla equilonge. Achenia glabra, 5-costata. 
Norra Mexico, Cerro de Pinal and Sierra Madre (Seemann, 1467, 2043). Hb. Kew. 
It was not until after the plate had been printed off that we discovered Schultz had 
already described this plant under the name of Ageratum microphyllum. We had 
overlooked this in consequence of a memorandum in Kew herbarium to the effect that 
the plant was not mentioned in the Botany of the ‘Herald.” By a slip in the 
‘Genera Plantarum,’ the pappus is described as consisting of ten instead of five pales. 
EXPLANATION OF TAB. XLII. 
Fig. 1, a flower-head ; 2, ovary, with pappus removed and corolla laid open; 3, a complete flower ; 
4, a stamen ; 5, a style; 6, a pale of the pappus: all enlarged. 
