COMPOSITZ. 497 
9. SPIRACANTHA. 
Spiracantha, H. B. K. Nov. Gen. et Sp. iv. p. 28; Benth. et Hook. Gen. Plant. il. p. 237. 
A shrubby monotype. 
1. Spiracantha cornifolia, H. B. K. Nov. Gen. et Sp. iv. p. 28, t. 313. 
GuatemaLa (Friedrichsthal).— VENEZUELA. Hb. Kew. 
Tribe II. EUPATORIACEA. 
Eupatoriacee, Benth. et Hook. Gen. Plant. ii. pp. 165 et 171. 
Thirty-four genera are referred to this tribe; and several of them are very numerous 
in species, especially Eupatorium. A very large proportion of the genera are peculiar 
to America, as well as the majority of the species of the genera having a wider range. 
10. PIQUERIA. 
Piqueria, Cav. Ic. iii. p. 18, t. 25; Benth. et Hook. Gen. Plant. ii. p. 238. 
About twelve shrubby and herbaceous species in Tropical America, from Mexico to 
Bolivia. 
1. Piqueria pilosa, H. B. K. Nov. Gen. et Sp. iv. p. 153. 
Souta Mexico, Desierto Viejo (Bourgeau, 824, 825), Tacubaya (Schaffner), between 
Capula and Pazcuaro, at 6600 feet (Humboldt & Bonpland). Hb. Kew. 
9. Piqueria serrata, A. Gr. in Proc. Am. Acad. xv. p. 25. 
Norra Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 496). 
Hb. Kew. 
3. Piqueria triflora, Hemsley, n. sp. 
Foliis anguste lanceolatis obtusis basi cuneatis primum utrinque pubescentibus, capitulis trifloris, 
involucri bracteis 8 extus omnino hirsutis, corolla tubo extus villoso, acheniis clavatis 
5-costatis basi attenuatis callosis. 
Herba erecta, 2-3-pedalis, et forsan ultra, ramosa, ramis pilosulis, striatis. Fola omnia opposita, 
anguste lanceolata, 2-5-pollicaria, apice obtusa, basi in petiolum brevem attenuata, remote 
calloso-denticulata, trinervia, utrinque plus minusve pilosula vel pubescentia. Capitula 
racemoso-corymboso-cymosa, triflora ; involucri bractex 3, extus omnino hirsute, elliptic, 
obscure trinervi, mucronate; corolle tubus extus villosus, basi fimbriatus, lobis parum 
brevior. Achenia nigra, glabra, clavata, 5-costata, deorsum attenuata, basi callosa, callo 
parvo vix obliquo. 
Norra Mexico, Cerro de Pinal (Seemann, 1478). Hb. Kew. 
We find no mention of this plant in Seemann’s Botany of the Voyage of the 
‘Herald’; but there is ample material of it in Kew herbarium. It differs from 
P. trinervia and P. pilosa in its flower-heads containing only three flowers in an 
involucre of three bracts, and in the latter being hairy on the back, as well as in other 
details. From P. serrata it differs in its hairiness, foliage, and achenes. 
