300 
MEXICO. 
\_LobeliacecB, 
1. Allocarpus 5CG6r^/o/^^^s; ramis pubescentibus, foliis oblongo-lanceolatis acuminatis 
calloso-dentatis 5-nerviis supra scabrls subtus ad nervos hirsuto-pubescentibus, capitulis 
corymbosis multifloris, ligulis 15-20, involucri squamis 15-20 3-4-serialibus striatis, 
acheniis radii glabris triquetris calvis, disci obovato-cylindraceis superne pubescentibus, 
paleis plurimis lineari-subulatis uniserialibus.— ^H ab. Talisco. 
1. Chlamysperma arenarioides ; humilis pubescenti-glandulosa, foliis ovatis integerrimis. 
(Tab. LXIV.) 
There can, we think, be no doubt of the propriet}' of referring this to the same genus with C. pratense, 
Less, and DC., so w'ell 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. 2. 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. Q. p. 232. 
2. G. luteo-alhum. L. — Sm. E. Bot. t. 1002. Z)e Cand. Prod. Q. p. 230. 
1. Trixis (§ Macrochltense) ohvallata ; fruticosa, foliis sessilibus oblongo-lanceolatis 
acutissimis sparse denticulatis glabris subtus junioribus raniulisque subsericeis, capitulis 
(magnis) corymbosis breviter pedicellatis, involucro 8-phyllo basi bracteis 4-5 amplis 
foliaceis ovatodanceolatis obvallato, receptaculo piloso-fimbrillifero. (Tab. LXV.) 
Near T. longifolia, 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. (§ Prionantheae) latifolia; fruticosa glabra, foliis sessilibus obovatis .spinuloso- 
dentatis rigidis basi cordatis, ramis floriferis elongatis bracteatis apice laxe corymbosis, 
involucri foliolis omnibus imbricatislanceolatisspinoso-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. LOBELIACE^. Juss. 
1. Lobelia ovalifolia ; berbacea 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) ; hut the leaves are much smaller, of 
a different form, coming suddenly to a very sharp point, and the serratures are considerably larger and more 
