1 
160 BOTANY OF THE VOYAGE OE H.M.S. HEKALB. 
form of this species. The aclia^nia of the disc are compressed, hiaristulate, aud their florets occur four- 
and five-tootlied often in tlie same flower-head. 
599. Spilanthes exasperata, Jacq. Icon. Kar. torn. 3. tab. 584. — Dc Cand. Prodr. torn. 5. p. 
G26. no. 40. Volcano of Chiriqui, Veraguas. 
I have seen an authentic specimen, raised in the garden at Schonbrunn, in Jacquin's Herbarium. It 
IS nearly related to Spilantlies ulir/inosa, De Cand., but is well distinguished by a stouter and more branching 
stem, by somewhat shorter pedicels, being more crowded at the summit of the branches, and by the waut 
of the female ligulate florets. 
600. Synedrella nudifiora, Giertn. de Fr. p. 456. tab. 171.— De Cand. Prodr. torn. 5. p. 629. 
no. 1. Panama. 
A most variable plant, of which Dr. Seemann collected very luxuriant specimens, 1-3 feet high. One 
of the fascicled flower-heads, which are in general sessile, becomes often peduncled, the peduncle varying from 
2-9 lines in length. The achsenia of the disc are compressed, tri- or tetraquetrous, 2-3-4-ari>latc some- 
times in the same flower-bead, the compressed ones being often longitudinally striate on both sides, often J| 
striate on one, tubcrculate on the other. 
601. Chrysaxthellvm integrifolium, Steetz; glaberrimum, caulibus adscendcntibus, foliis ob- 
lanceolatis basi attenuata intcgerrimis, versus apicem serrulatis, achseniis radii crassis teretibns Ion- 
gitudinaliter sulcatis tuberculo apicali coronatis crctcrum calvis glabris, acluxniis disci plano-com- 
pressis sterilibus (?) . Jn savanas^ about Panama. 
Hcrba glaberrima, ut videtur biennis, radice simplici, caulibus procumbentibus, adsccndentibus, 
basi parce foliatis, apice longiuscule nndis monoccphalis, sub capitulo paullo incrassatis. Folia radi- 
caJia oblanccolata, basi in pctiolum attenuata et integerrima, versus apicem serrulata, pollice paullo 
longiora, medio 3-4 lineas lata, cauUna alterna, rara, multo minora. Tnvolncri biscrialis squamaj 
omnes lanccolato-ovatfc, medio nervosa, brunnese, margine pallido, cnervi, latiusculo cinct^, exteriores 
5 latiores, intcriorcs 10 angustiores, csetcrmn conformes. Recepiaculum planum, paleaceum, jjaleis 
planis, gracUibus, anguste linearibus, nervo crasso brunneo pcrductis, margine pallidiorc circumdatis. 
Fhres marginaJes fceminei, ligulati, uniscriales. . Liyul<B tube brevissimo, c^terum plan^, lineares, 
glabriE, supra sulplim-eaj, subtus brunnese, 3 lineas longse, basi nervis 4 percursje, quonmi duj 
exteriores versus medium extrorsum spectantes, cum margine confluunt, duo intcriorcs vcro parallelc 
percurrunt ligulam, cujus apicem bifidum attingunt ; ovarium Hneare, calvum j stylus profunde bifidus, 
basi simplex, glaber ; stigmatis rami divergcntes, l^ves, obtusiusculi. Flores disci hcrmaphroditi, nume- 
rosi, tubulosi, glabri, tubo brevi, fauce triple vel quadruplo longiore, valdc ampliata, 5-dentata, den- 
tibus raarginatis, subacutis, glabris, nervis 5 validis inter dentium sinus excurrentibus perducti. 
Filamt-nta filiformia, stricta. Anthera nigricantes, basi rotundat^, supra conncctivum in appeiitli- 
culam liberam ovatam continuam hyalinam nninervem products. Pollims granula sph^rica 
nndique echinulata. Stylus longe cxscrtus, basi simplex, glaber, profunde bifidus j stigmatis rami 
supra bifurcationem papiUis latiusculis, more Vemoniacearum plurimarum, dense bispidi. Ach<snia 
radii fertiUa, crassa, glabra, teretia, cylindrica, longitudinalitcr 8-sulcata, sulcis in summum apicem 
cxcTirrentibus, basin imam tamcn nequaquam attingcntibus, tuberculo apicali, ccntrali coronata 
eceterum calva, sesquilineam longa. Ach^enia disci inania, linearia, piano -comprcssa, remote ciHata' 
abortiva (an semper ?) . ' 
In the single fructiferous flower-head I have before me, all ach^^nia of the ray are well ripened, whilst 
Qy^^ rd^ M 
