brevibus reliquis (14-15) subæqualibus lineari-lanceolatis membranaceis striatis sub 15-
tìoris, acheniis striatis puberulis.
H a b . Tafisco.—Leaves 8-4 inches long ; petiole 1 inch. Capitula J of an inch in diameter. Pappus
white, as the corollas also appear to be.
1. He te ro th e ca mw/oirfes. Cass,— DC, Prod. b.p. 31T.—Diplocoma villosa. Sweet, Fl.
Gard. t. 2 46.—Doronicum Mexicanum. Cerv. in Link et Otto, Hort. Berol. t. 22.
The H . ieptoglossa, DC., is probably not distinct from this.
1. Baccharis longifolia? De Cand. Prod. 5. p. 402.
In our piant, 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.
I f 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. E c lip ta erecta. L — De Cand. Prod. 5. p. 490.
2. E . hrachypoda. Mick.— De Cand. Prod. 5 .;? . 491.
C HÆTYMENIA. Nov. Gen.
Capitulum multiflorum, heterogamum, fl. radii ligulatis foemineis obovatis, disci plurimis tubulosis herma-
phroditis. Involucri patenti-campanulati squamæ paucæ subbiseriales, inæquales, laxe imbricatæ, ovatæ,
subacuminatæ, vis foliaceæ. Receptaculum nudum. Styli rami attenuati pilosi. Achenia oblonga, basi
attenuata, angulata, angulis pilosis. P a p p i setæ rigidæ, sub-20, corollæ tubulosæ longitudine, piloso-hispidæ,
basi utrinque ala membranacea incisa auctæ.—Herba? subsimplex, Mexicana, glabra. Caulis icres. Folia
elongata, lineari-lanceolata, subpunctata, trinei-via, opposita, basique connata. PeduncuU terminales
axillaresque, longissimi, nudi. Flos majusculus {diametro bipoUicaris), aureo-Jïavus.
I . Chætyraeuia peduncnlaris. ( T a b . L X I I .)
H a b . Talisco.—This genus appears to belong to the Subtrib. Tagetineoe of the S e n e c io n id e æ {DC .) -•
but the character of the genus comes near to Burrielia in the H e l e n ie æ . It, however, seems quite distinct
fi-om anything hitherto published.
T a b . LX II. Fig. I. Floret of the ray ; 2. Do. of the d is k j/i^ .S . Seta of the pappus:—»icprH/crf.
1. Po ro p h y llum ¿/¿Tiarm.? D e Canrf. Prorf. 5. jo. 649.— Cacalia L inaria. Cav.Ic.3.p.
19. t. 257.— H a b . Talisco.
TU LO CA RPU S . N ov. Gen.
Capitulum pauciflorum, monoicum ; radii flosculo solitario foemineo ligulato, apice tridentato, tubo gracili
basi dilatato ; disci flosculis 3-4, tubulosis masculinis, tubo longo gracili, limbo campanulato, alte 5-fido.
Involucrum cylindraceum, 6-phyllum, biseriale, foliolis 3 ext. majoribus æqualibus striatis acutis, 3 int.
scariosis, unico fiorifero. Receptaculum paleaceum, paleis involucri serieì int. similibus. Antheræ exsertæ
(viridescentes) ; filamentis dense barbatis. Stylus (fl. masc.) paululum exsertus, indivisus, puberulus.
Achenium solitarium in singulo capitulo, magnura, obovato-oblongiim, compressum, basi dorso callo magno
rugoso tetragono.—Herba ? Mexicana, glabra. Catilis teres. Folia opposita, petiolata, ovato-lanceolata,
serrata. Corymbi latérales terminalesque compositi.
T A I i L X / I