298 MEXICO. IComposita, 
brevibus reliquis (14-15) subaequalibus lineari-lanceolatis membranaceis striatis sub 15- 
floris, acheniis striatis puberulis. 
Hab. Talisco. — Leaves 3-4 inches long ; petiole 1 inch. Capitula f of an inch in diameter. Pappus 
white, as the corollas also appear to be. 
1. Heterotheca Cass — DC. Proc?. 5. /». 317. — Diplocoma villosa. Sweet, FI. 
Gard. t. 246. — Doronicum Mexicanum. Cerv. in Link et Otto, Hort, Berol. t. 22. 
The H, leptoglossa, DC., is probably not distinct from this. 
1 . Baccharis longifolia ? De Cand. Prod. 5. p. 402. 
In our plant, the exterior scales of the involucre are ovate, the interior oblong, slightly but distinctly 
ciliated, and the lower part of the branches appears woody. 
2. B. hirtella? De Cand. Prod. b.p. 418. 
If this be the plant of De Candolle, the leaves are 5-6 inches long, an inch or an inch and a half broad, 
the capitula densely clustered, of a pale straw'-colour, almost white. 
1. Eclipta erecta. L De Cand. Prod. 5. p. 490. 
2. E. hrachypoda. Mich.—De Cand. Prod. b. p. 491. 
CHiETYMENIA. Nov. Gen. 
Capitulum multiflorum, heterogamum, fl. radii ligulatis foemineis obovatis, disci plurimis tubulosis herma- 
phroditis. Involucri patenti-campanulati squamae paucse subbiseriales, inaequales, laxe imbricatm, ovatas, 
subacuminatcE, vix foliacese. Receptaculum nudum. Styli rami attenuati pilosi. Achenia oblonga, basi 
attenuate, angulata, angulis pilosis. Pappi setae rigidae, sub-20, corollae tubulosae loiigitudine, piloso-hispidae, 
basi utrinque ala membranacea incisa auctas. — Herba? subsimplex, Mexicana, glabra. Caulis teres. Folia 
elongata, lineari-laneeolata, subpunctata, trinervia, opposita, basique connata. Pedunculi terminates 
axillaresque, longissimi, nudi. Flos majusculus {diametro bipollicaris'), aureo-fiavus. 
1. peduncularis. (Tab. LXII.) 
Hab. Talisco. — This genus appears to belong to the Subtrib. Tagetineae of the SENECiONiDEiE {DC.) : 
but the character of the genus comes near to Burrielia in the Heleniea:. It, however, seems quite distinct 
from anything hitherto published. 
Tab. LXII. Fig. 1. Floret of the ray ; Jig. 2. Do. of the disk ; Jig. 3. Seta of the pappus : — magnified. 
1. Porophyllum Linaria? De Cand. Prod. 5. p. 649. — Cacalia Linaria. Cav. Ic. 3. p. 
19. t. 257 — Hab. Talisco. 
TULOCARPUS. Nov. Gen. 
Capitulum pauciflorum, monoicum ; radii flosculo solitario foemineo ligulato, apice tridentato, tubo gracili 
basi dilatato ; disei flosculis 3-4, tubulosis masculinis, tubo longo gracili, limbo campanulato, alte 5-fido. 
Involucrum cylindraceum, 6-phyllum, biseriale, foliolis 3 ext. majoribus sequalibus striatis acutis, 3 int. 
scariosis, unico florifero. Receptaculum paleaceum, paleis involucri seriei int. similibus. Anthera exsertae 
(viridescentes) ; filamentis dense barbatis. Stylus (fl. masc.) paululum exsertus, indivisus, puberulus, 
Achenium solitarium in singulo capitulo, magnum, obovato-oblongum, compressum, basi dorso callo magno 
rugoso tetragono. — Herba? Mexicana, glabra. Caulis teres. 'SoXva. opposita, petiolata,ovato-lanceolata, 
serrata. Corymbi laterales terminalesque compositi. Flores Jiavi. 
