176 COMPOSITZ. 
1. Oyeda acuminata, Benth. et Hook. Gen. Pl. ii. p. 374. 
Viguiera acuminata, Benth. in Vidensk. Meddel. 1852, p. 91. 
Costa Rica, Volcan de Irazu, 9000 feet ( (rsted). Hb. Kew. 
2. Oyedwa ampeloides, Hemsley, n. sp. 
Scandens, fere glabra, foltis amplis ovatis parcissime hispidulis supra nitidis, corymbis oligocephalis 
longiuscule pedunculatis axillaribus terminalibusve, capitulis ad 2 poll. diametro, involucri 
bracteis herbaceis, ligulis angustis, paleis membranaceis obtusis carinatis, acheniis sepe 5-6- 
aristatis, aristis 2 multo longioribus. 
Frutex scandens, fere omnino glaber, ramis elongatis, asperulis. Folia longiuscule petiolata, sub- 
coriacea, ovata vel ovato-oblonga, in ramis floriferis usque ad 6 poll. longa, obtusiuscula, 
remotissime obsoleteque calloso-serrulata, utrinque parcissime hispidula, supra nitida (in vivis 
glutinosa?), subtus opaca, subtrinervia. Capitula homochroma, flava, ad 2 poll. diametro, 
corymbosa; corymbi axillares vel terminales, 3-5-flori, foliis equales vel longiores, vel pedun- 
culi superiores breviores, interdum monocephali ; involucri bracteze 2-3-seriatz, herbacez, 
appresse, plane, oblonge, obtuse ; receptaculum convexum; palee membranacex, glabre, 
complicate, obtuse, dorso carinate, floribus paullo breviores; ligule ad 12, anguste; disci 
corolle fere cylindrice, lobis hirsutis. Achenia compressa, claviformia, glabra, anguste 
Q-alata, sepe 6-aristata, alis ciliolatis, aristis in fasciculas duas aggregatis, et 2 multo longi- 
oribus. 
Sourn Mexico, valley of Mexico (Bourgeau, 2994). Hb. Kew. 
3. Oyedea macrophylla, Benth. et Hook. Gen. Pl. ii. p. 374. 
Viguiera macrophylla, Benth. in Vidensk. Meddel. 1852, p. 92. 
Costa Rica, mountains of Aguacate (Ersted, 104). Hb. Kew. 
4. Oyedea ovalifolia, A. Gr. in Proc. Amer. Acad. v. p. 183. 
Sourn Mexico, near Tantoyuca (Ervendberg, 97). Hb. Kew. 
121. TITHONTA. 
Tithonia, Desf. in Ann. Mus. Par. i. p. 49, t. 4; Benth. et Hook. Gen. Plant. i. p. 374. 
Robust annual herbs, endemic in Mexico and Central America. 
1. Tithonia aristata, Gérst. in Vidensk. Meddel. 1852, p. 114. 
Costa Rica, Aguacate (rsted). 
9. Tithonia recurrens, A. Gr. Pl. Fendl. p. 85. 
Norra Mexico, Cosiquiriachi, Chihuahua (Wislizenus). 
3. Tithonia heterophylla, Griseb. in Bonplandia, 1858, p. 9. 
Panama, Isle of Taboga (Duchassaing). 
4. Lithonia scaberrima, Benth. in Vidensk. Meddel. 1852, p. 91. 
Nicaragua, Chionotega, Segovia, 5000 feet (Grsted). 
5. Tithonia speciosa, Benth. et Hook. Gen. Pl. ii. p. 375. 
Helianthus speciosus, Hook. Bot. Mag. t. 3295. 
Leighia? speciosa, DC. Prodr. v. p.583.: 
