BOTANY OF THE VOYAGE OF THE SULPHUR. 
CISTACER. 
22. Hevrantuemum glomeratum, Lag. Dun. in DC. Prod. 1. p. 269.—H. polifolium, Hook. et 
Arn. Bot. Beech. p. 410. vix Torr. et. Gr.—Tepic. 
This is probably the only species hitherto found in Mexico (exclusive of 
Texas) or Guatemala.* The two kinds of flowers to be found on the same speci- 
mens have been well distinguished by Spach, but they do not always co-exist on 
the same branch at the same time, nor are they sufficient for generic distinctions, 
any more than the apetalous flowers which have now been so frequently observed 
in several Leguminose, Malpighiacee, Violacez, and others. We should therefore 
refer to H. glomeratum both the Heteromeris Mewicana and the Teniostoma 
micranthum of Spach, but the H. polifolium of Torrey and Gray from Texas will 
probably be found to be a constantly distinct species. 
SaMYDACER. 
23, CASEARIA (Pitumba) pubiflora, sp. n., ramulis glabris, foliis oblongis acuminatis serrulatis 
basi suboblique cuneatis membranaceis punctatis glabris vel in nervo medio puberulis, pedicellis 
fasciculatis, floribus decantheris 5-partitis pubescenti-villosis, laciniis calycinis oblongis.—Guayaquil. 
Folia tripollicaria vel paullo longiora, crebre pellucido-punctata, acumine longiusculo acuto. Pedicelli 
numerosi, in axillis vetustis glomerati, vix 2 lin. longi. Calyces fere 24 lin. longi, tomento brevi dense obtecti. 
Filamenta sterilia subclavata, Ovarium pubescens. Stigma (seu styli apex stigmatosus) subcapitatum. 
This species belongs to the section Pitwmba, as characterised in my account of 
Guayana Samydacee in the London Journal of Botany. It agrees in many 
respects with the descriptions of C. macrophylla, Vabl, and of C. celtidifolia, 
‘Humb. et Kunth, from both of which it differs chiefly in the calyx. 
= : 8 mays _ pints. sent ftom Guatemala an interesting new species of the allied genus Lechea aise 
y ee haracterieed : Lechea Skinneri, humilis, ramosissima, molliter pilosa, foliis linearibus subulatisve 
sae subternisve, floribus distincte pedicellatis, capsulis late globosis.—Species L. minori affinis at facile dis- 
_— floribus - presertim ecapsulis multo majoribus. Habitus humilior, basi ramosior. Folia ramorum 
sterilium angustiora, pilis longiusculis appressis canescentia, Flores ad apices ramulorum pauci. Pedicelli 
1}-2 lin. longi. Sepala interiora concavo-carinata. Petala tria, Stamina (an constanter?) tria, Styli rami 
ph oso-multifidi, Capsulee magnitudine earum LZ, Drummondi, 3-6-sperme, placentis ut in L. mimore 
membranaceo-crustaceis. 
