* 
of the Galapagos Archipelago. 209 
Genus Elvire affine. Radix annua. Caulis pedalis, herbaceus, teres, erectus, e basi tricho- 
tom? divisus; ramis ascendentibus, pubescentibus. Folia opposita, petiolata, ovata, obtuse 
duplicato-serrata, coriacea, suprà scabriuscula, nitida, subtüs pubescentia, nigricantia. 
Capitula azillaria, densissimé congesta, massam depresso-sphericam } unc. latam efor- 
mantia. Folia involucrantia latè ovata, acuminata, hispida. Corolle valdà inconspicue. 
157. DEswocEPHALUM INELEGANS, Hook, fil, 
Hab. Charles Island, Charles Darwin, Esq. 
MIcROCOECIA, n. g. 
Capitula axillaria, pauca, valdé compressa, monoica, subtriflora; floribus feemineis ligulatis, 
masculis tubulosis. mvolucrum compressum, 3—4-foliolatum, foliolo unico latè obovato 
unilaterali, cæteris parvis collateralibus. Receptaculum minimum, epaleaceum. Corolla 
Jf. fem. tubo gracili; lamina rotundatá, obscuré crenata: fl. masc. 4-fida, tubo superne 
ampliato, segmentis extüs barbatis. Anthere semi-exserte, ecaudate. Stylus fl. ftem. 
in ramos 2 elongatos desinens; ff. masc. indivisus. Achenium cuneatum, compressum, 
obscuré trigonum, parcé pilosum. 
Herba pusilla, repens, scaberula ; ramis gracilibus, ascendentibus. Folia opposita, petiolata, 
rigidula, ovata, acuta, serrata, suprà hispidula, subtüs cana, venis prominulis. Capitula 
minima, breviter pedicellata. Involucri foliolum exterius planum, acuminatum, nervosum, 
marginibus basi involutis. Flores exserti, flavi. 
158. MicRocoEcriA repens, Hook. fil. 
Hab. James Island, Charles Darwin, Esq. 
A singular little plant, also allied to Elwira and Milleria, but very distinct 
from both those genera. The stems are about a span long: the leaves 4 inch 
long. 
MACRAEA, n. g. 
Capitulum multiflorum, heterogamum, radiatum ; floribus radii squamis involucri tectis, pau- 
cis, 1-seriatis, foemineis ; disci tubulosis. Jnvolucri hemispherici squamis sub 2-seriatis, 
disco brevioribus. Receptaculum convexum, paleaceum ; paleis deciduis flores involu- 
crantibus. Corolle radii tubo brevi, gracili; ligula lata bifida: disci tubo 4-fido, den- 
tium marginibus incrassatis. Anthere breviter appendiculate. Stylus fl. radii in ramos 
2 obtusos desinens; ff. disci ramis cono latiusculo terminatis. Achenium obovato- 
cuneatum, compressum, trigonum, hispidum, pappo brevi e squamis paucis ciliatis 
coronatum. — P 
Genus Heliopsideis relatum. Frutex ramis erectis, virgatis, nodosis. Folia in ramis abbre- 
