118 BOTANY OF THE VOYAGE OF THE SULPHUR. 
margine recurva, penninervia, rugosa, utrinque pube brevi scaberrima. Capitula ad apices ramorum pauca, 
breviter pedunculata, quam in S. curvifiora paullo majora. Involucri squame perpauce, ovate, breves. 
Receptaculum elongato-conicum. Pale floribus breviores, ovate, acuminate, complicatee, crassiuscule, mar- 
gine membranacete, exteriores apice squarrose. Corollee omnes tubulosee, tubo brevissimo hispido, fauce 
elongato vix latiore glabriusculo, limbo 5-dentato. Stamina subinclusa ; filamenta complanata; anthere basi 
truncate, appendice apicis brevi ovata mucronata. Styli rami exserti, complanati, apice subtruncati et cono 
brevi superati. Acheenia lateraliter compressa, obovata, plana, emarginata, ad angulos ciliata et summo apice 
subalata ; aristee breves, ciliate. 
461. SynepRELLA nodiflora, Gertn.—DC. Prod. v. 5. p. 629.—Panama to Guayaquil. 
462. Tacetes microglossa, sp.n., erecta, elata, alterne ramosa, foliis inferioribus oppositis 
superioribus alternis pinnatisectis, segmentis 5-8-jugis lineari-lanceolatis acute serratis, infimis 
paucis setaceo-divisis, pedunculis elongatis apice incrassatis monocephalis, involucris tubulosis 4-5- 
dentatis sub-20-floris, ligulis paucis minimis.—Salango. 
Affinis 7, glandulifere. Rami elongati, laterales capitula superant. Folia forma fere 7’, patula, 2-3- 
pollicaria ; segmenta subdistantia, 6-12 lin. longa, acuta et acute serrata, basi angustata, glandulis sparsis 
mediocribus ; segmenta infima cauli approximata, parva, in lacinias paucas capillaceas fissa. Pedunculi ad apices 
ramorum pauci, erecti, tripollicares. Capitula per anthesin 5-6 lin. longa; involucra fructifera 7-8 lin. longa, 
maculis linearibus notata, dentibus obtusiusculis. Acheenia nigra. Pappi palearum una flores disci subsequans 
acutissima, ceeterse connate in paleam unicam dimidio breviorem obtusam vel emarginatam. 
463. Tacetes multiseta, DC. Prod. v. 5. p. 645.—Tepic. 
464, Porornyiium viridiflorum, DC.? Prod. v. 5. p.648.—Hook. et Arn. Bot. Beech. p. 436. 
non Benth. Pl. Hartw. p. 20. (quod species nova est.)}—San Blas to Tepic. 
465. Oxypappus scaber, gen. nov. Heleniearum, (Plate XLII.)—Chrysopsis scabra, Hook. et 
Arn. Bot. Beech. p. 434.—San Blas to Tepic. 
Cuar. Gen. Capitula heterogama, radiata. Involucri squame uniseriales, acute, sequales. 
Receptaculum convexum, nudum. Flores radii pistilligeri (an fertiles ?), lamina oblonga triden- 
tata. Flores disci tubulosi, 5-dentati. Styli rami filiformes, acutiusculi, vix hirtelli. Anthere 
ecaudate. Achenia linearia, Pappi ariste 3-5, scabrelle, basi paleaceo-dilatate. 
| o. scabra, Herba annua, erecta, 1-1}-pedalis, basi hispida, superne pube brevi glandulosa scabriuscula. 
Caulis tenuis, striatus, rigidulus, superne laxe corymbosus, ramis elongatis gracilibus. Folia infima ad basin 
ceaulis subrosulata, oblonga, 1}-2-pollicaria, basi angustata, margine grosse dentata vel subintegerrima ; caulina 
ies inferiora opposita, lanceolata, basi angustata, margine integerrima vel paucidentata vel basi utrinque 
lobulo Hneart aucta ; suprema alterna, parva, linearia, obtusa, integerrima. Capitula parvula, in apicibus ramu- 
lorum solitaria. Involucrum hemispheericum, squamis 1} lin. longis, dorso viridibus scabro-pubescentibus, margine 
phn Flores subglabri, lutei: radii tubus gracilis, lamina 2 lin, longa; disci involucro vix 
eeores, bast tenuiter tubulosi, versus medium abrupte dilatati in faucem tubulosam, tubo vero duplo ampliorem, 
dentibus limbi brevibus. Stamina vix exserta, appendice lanceolata. Styli rami breviter exserti, recurvi. 
etimcia sas lineam longa, nigri, pilis paucis minutis conspersa. Pappi aristee achzenio sublongiores, eequales, 
in radio sapius tres, in disco quinque. 
3 Hooker and Arnott, in describing this plant from the present collection as 4 
hrysopsis, expressed, at the same time, their opinion that it would hereafter be 
