COMPOSITA. 175 
25. Zexmenia tagetiflora, D. Don; Steud. Nomen. Bot. ed. 2, pars 2, p. 798. 
Lipocheta tagetifiora, G. Don; Steud. Nomen. Bot. ed. 2, pars 1, p. 53. . 
- Mexico. 
We have not found any description of this plant. 
26. Zexmenia trachylepis, Hemsley, n. sp. 
Foliis scaberrimis crassiusculis ovato-oblongis, capitulis mediocribus paucis breviter pedunculatis, 
involucri bracteis nonnullis apice reflexis pagina superiore scabridis, paleis dorso-alatis apice 
dilatatis hirsutis, acheniis 2—3-aristatis, squamulis intermediis sat distinctis. 
Frutex, ramis teretibus, ferrugineo-furfuraceis. Folia petiolata, subcoriacea, ovato-oblonga, 3-43 
poll. longa, obtusa, remotiuscule calloso-serrulata, supra scaberrima, subtus scabrida, venis 
prominulis. Capitula ad 9 lineas diametro, homochroma, flava, breviter pedunculata, seepe 
ternata, pedunculis communibus quam folia brevioribus ; involucri bractez ad 12, decussate, 
scarioso-coriacez, late, obtuse vel rotundate, concave, ciliate, exteriores extus leviter furfu- 
races, apice reflexee, pagina superiore scabrida; receptaculum subplanum; palee scariose, 
complicate, flores vix equantes, dorso alate, glabre, apice dilatate, rotundatz, hirsute. Flores 
puberuli. Achenia 2-3-aristate, 2-3-alate, multisquamulate ; aristze plus minusve inequales, 
floribus paullo breviores. 
Soutn Mexico, Yucatan and Tabasco (Johnson, 24). Hb. Kew. 
27. Zexmenia villosa, Polak. in Linnea, xli. p. 579. 
Costa Rica, San José (Polakowsky). 
28. Zexmenia zinnioides, Hemsley, n. sp. 
Ramis graciliusculis elongatis, foliis subsessilibus ovato-oblongis scabridis nitidis, capitulis termi- 
nalibus sepissime solitariis, paleis quam flores disci paullo brevioribus, acheniis latiuscule alatis, 
radii aristis omnibus brevibus. 
Frutex ? vel herba, ramis graciliusculis, elongatis, scabro-puberulis, interdum ferrugineis, striatis. 
Folia sessilia vel brevissime petiolata, rigida, ovato-oblonga, 2-3 poll. longa, acuta vel obtusi- 
uscula, calloso-serrulata, supra parce strigilloso-scabrida, nitida, subtus precipue in venis 
strigilloso-scabrida. Capitula homochroma, rosea vel purpurea, sepissime solitaria, terminalia, 
13-14 poll. diametro, pedunculis 9-12 lineas longis; involucri bracteze ad 16, decussate, 
scarios, exteriores latez, acute, puberule, ciliate, interiores oblongze vel lineares, omnino 
glabra, apice colorate ; receptaculum convexum ; pale membranaceo-scariose, floribus paullo 
breviores, apice anguste spathulate, coloratz, dorso obscure ciliolatz. Flores radit 10-12, 
ligulis latis ; disci numerosi, corollis infundibuliformibus, lobis hirsutis. Achenia latiuscule 
2-3-alata, 2-8-aristata; alee ciliolate, sursum producte, aristis adherentes, ariste 3 radii fere 
obsoletz, disci 2 inzequales, corollis fere triplo breviores. 
Nort Mexico, Cerro de Pinal (Seemann, 1464.) Hb. Kew. 
120. OYEDAA. 
Oyedea, DC. Prodr. v. p.576; Benth. et Hook. Gen. Plant. ii. p. 374. 
An exclusively Tropical-American genus, comprising about twenty-four shrubby and 
herbaceous species. It would be better placed as a section of Zexmenia, as the only 
essential difference is that the ray-flowers are neuter. 
