156 BOTANY OF THE YOIAGE OF H.M.S. HERALD. 
I have not seen authentic specimens from Cuba; but Dr. Scemann's single specimen agrees well with 
De Candollc's diagnosis. Most of the leaves are unequal at the base. It approaches however to TV. Cara- 
casana, De Cand., but seems distinguished hj the longer and truly lanceolate scales of the exterior 
involucre, by the always solitary pedicels, and by a somewhat different habit. Eipe aclijcnia I have 
not seen. 
587. Wedelia AcapuJcenals, H. B. K., Nov. Gen. et Sp. torn. 4. p. 215. no. 2.— Dc Cand. 
Prodr. torn. 5. p. 542. no. 26.— fT. calycina, v. Schlechtendal ! Linnrea (1831), torn. 6. p. 727. 
no. 181. (An etiam Richard in Pcrs. Synops. torn. 2. p. 490. no. 3?) In savauas about Panama. 
I have seen authentic specimens of this plant gathered by Humboldt at Acapulco (Mexico) and by 
Ehreuberg m the Isle of St. Thomas, and imblished by v. Schlechtendal in the Linna^a, 1. c., under the name 
of Wedclia calycina^ Eich. These, as well as Dr. Seemann's specimens, belong to the same species. In the 
latter from the Isthmus however the leaves are somewhat more attenuated at the base, so that the petiole 
of the lower ones is not longer than a line, whilst the upper leaves are almost sessile. But the same differ- 
ence occurs in Ehrenberg's specimens, who collected two varieties, one of which agrees with our plant, 
having the leaves 1 inch long and \ inch broad ; in the other, with somewhat larger flower-heads, the leaves 
are of double the size, but with the same shape. Other differences I could not find. - 
588. Melananthera hastata, Richard in Michx. Flor. Bor. Amcr. torn. 2. p. 106, 107*. — 
R. Brown.— il'/e/ffHMera hastata, De Cand. Prodr. torn. 5. p. 545. no. 1. 
Var. /3. pandurata, Pursh. Panama. 
589. Melananthera microphylJa, Steetz; caide procumbente ranaoso, foliis brcvitcr pediccllatis 
oblongo-lincaribus serratis acutis utrinque strigosis, capitulis in apice ramorum solitariis, paleis re- 
ceptaculi acuminatis. On road-sides about Panama. 
Radix perennis, ligncsccns, caitJes plures filiformcs striatos subangulatos ramosos pilis stri- 
gosis adprcssis paucis asperulos cmittens. Rami oppositi, basi foliati, apice longiusculc nudi_, capi- 
tulo solitario tcrminati. Folia brcvitcr pctiolata, petiole vix lincani longo, opposita, coriacca, oblongo- 
linearia, apice acuta, basi brcvitcr attcuuataj margine argute serrata, utrinque strigis adprcssis albis 
cancsccntia, asperula, supra nervis impressis, subtus prominentibus reticulata, pscudo-triplinervia, 
revera tamcn penninervia,— nervis scilicet secundariis, angulo fcrc recto divergcntibus, juxta margincm 
sursum tcndcntibuSj cum illo parallclis et hujusmodi cum sequente sese jungentibus, nervos con- 
tinues longitudinalcs marginales utrinque simulantibus,— 6-10 lineas longa, 1-2 lincas lata. Pedun- 
culi ramos terminantes 1-2-pollicarcs, nndi et omnino ebractcati, mouoccphali, sub capitulo dcnsius 
strigosi. Capitula homogama, floribus circitcr 16-20 onusta, parva, florentia 3-3^ lincas alta et 
lata. Involucri biserialis campanulato-patentis disco duple fcrc brcvioris squamui imbricate, ri- 
gidse, infequales, (cxteriores plerumque multo angustiorcs et brcviorcs,) ovat^, acut^, extus dense 
strigosie, cancscentcs, intus apice strigeso excepto glabemm^, nervosa. Receptaculi paleacci 
convexiusculi palese persistentes, rigidje, subrequalcs, plicatfe ct ante anthcsiu florcs amplcctcntes, 
anthesi peracta basi carinatse, versus apiccm adplanatse, ebovato-cuncatse et in acumen cuspi- 
datum angustatse, extus pube brevi hirtse, intus plcrumquc glabra^., margine carinaquc serrulate- 
* Kunth informs us, in Humboldt's Nov. Gen. et Sp. torn. 4. p. 109, that the name "Melanthcra" has 
not been proposed first by Eohr, but was only given by Eicliard in Eohr'a Herbarium. Therefore the more 
orthographical denomination " Melananthera " of the same author, althougli published some years later, 
must be retained, so much the more as Rob. Brown, who emendated the generic character, adopted this 
name (cf. Transact, of the Linn. Soc. tom. sli. pt. 1. p. 117). 
