300 



MEXICO. 



[Lobeliacece. 



1. Allocarpus scabrifolius ; ramis pubescentibus, foliis oblongo-lanceolatis acuminatis 

 calloso-dentatis 5-nerviis supra scabris subtus ad nervos hirsuto-pubescentibus, capitulis 

 corymbosis multifloris, ligulis 15-20, involucri squamis 15-20 3-4-seriaIibus striatis, 

 acheniis radii glabris triquetris calvis, disci obovato-cylindraceis superne pubescentibus, 

 paleis plinimis lineari-subulatis uniserialibus. — Hab. Talisco. 



1. Cblamysperma arenarioides ; bumilis pubescenti-glandulosa, foliis ovatis integerrimis. 

 (Tab. LXIV.) 



There can, we think, be no doubt of the propriety of referring this to the same genus with C. pratense, 

 Less, and DC, so well figured by Humboldt and Kunth under the name of Unxia pratensis (Nov. Gen. 

 Am. t. 401). In our plant, however, the central florets have the limb quadrifid, and they are abortive. The 

 curious broad incurved wing of the marginal achenia is quite smooth, not tuberculated. 



Tab. LXIV. Fig. 1. Plant : — nat. size ;—fig.1. Capitulum ; fig. 3. Floret from the disk ; fig. 4. Floret 

 from the ray, with the accompanying leaflet of the involucre ; front view ; the fruit nearly ripe ; fig. 5. Back 

 view of the fruit ; fig. 6. Transverse section of the same : — magnified. 



1. Gnaphalium purpureum. L. — De Cand. Prod. 6. p. 232. 



2. G. luteo-album. L.—Sm. E. Bot. t. 1002. De Cand. Prod. 6. p. 230. 



1. Trixis (§ Macrochlaense) obvallata ; fruticosa, foliis sessilibus oblongo-lanceolatis 

 acutissimis sparse denticulatis glabris subtus junioribus ramulisque subsericeis, capitulis 

 (magnis) corymbosis breviter pedicellatis, involucro 8-pbyllo basi bracteis 4-5 amplis 

 foliaceis ovato-lanceolatis obvallato, receptaculo piloso-fimbrillifero. (Tab. LXV.) 



Near T. longifulia, Don ; but the leaves are quite sessile. Corollas bright yellow ; pappus tawny. 



Tab. LXV. Fig. 1. Capitulum, with its double involucre; fig. 2. Young floret; fig. 3. Old do. : — 



magnified. 



2. T. (§ Prionantbeae) latifolia; fruticosa glabra, foliis sessilibus obovatis spinuloso- 

 dentatis rigidis basi cordatis, ramis floriferis elongatis bracteatis apice laxe corymbosis, 

 involucri foliolis omnibus imbricatis lanceolatis spinoso-acuminatis pubescentibus, capitulis 

 10-12-floris. 



Leaves in the lower part of the plant 4-5 inches long, 3 broad. Lower bracteas leaf-like, small ; upper 

 ones acuminate subspinulose, and gradually passing into the spinescent scales of the involucre. Receptacle 

 naked. Achenium erostrate. Pappus nearly white. Corollas apparently yellow. 



Orb. XLIX. LOBELIACEjE. Juss. 



1. Lobelia ovalifolia ; herbacea ubique pubescens, caule erecto stricto, foliis sparsis 

 ovalibus sessilibus subcoriaceis duplicato-glanduloso-serratis acutissimis, pedicellis elonga- 

 tis solitariis axillaribus unifloris, corolla pubescente (rubra) superne usque ad basin fissa, 

 limbo 5-fido, laciniis lineari-acuminatis, filamentis hirsutis. 



Nearly allied to L. mucronata, Cav. (and Hook. Bot. Mag. t. 3207) ; but the leaves are much smaller, of 

 a different form, coming suddenly to a very sharp point, and the serratures are considerably larger and more 



