34 BOTANY OF THE VOYAGE OF THE SULPHUR. 
My friend M. Decaisne, who has described the Asclepiadiacez in the eighth 
volume of De Candolle’s Prodromus, has kindly examined this and the following 
species, both of which he has pronounced to be new. He has also furnished me 
with accurate drawings of the minute parts of the flower, which have been copied 
into the accompanying plate. 
Plate XVIIL. fig. 1, bud; fig. 2, expanded flower; fig. 3, anther seen from outside, a, leaflet 
of the corona; fig. 4, anther seen from inside, 6, terminal membrane of the anther, c, cells; 
fig. 5, pollen mass; all magnified. 
116. SarcostemMa arenarium, sp. n., volubile, ramis puberulis, foliis lineari-spathulatis acutulis 
carnosulis utrinque aveniis pube brevissima inspersis, pedunculis folium vix equantibus multifloris, 
corollz laciniis patulis ciliatis extrorsum calycibusque pubescentibus, introrsum atro-violaceis papil- 
losis, corona staminea exteriore integra, interioris foliolis gynostegium vix equantibus. (Decaisne 
MSS).—Bay of Magdalena. 
Caules elongati, crassitie Convolouli arvensis, teretes vel compressi, virides, striatuli, juniores praesertim 
sub nodis adpresse puberuli, ceeterum glabri. Folia 1-1 poll. longa, 1-2 lin. lata, apice breviter acutata, basi 
longuiscule angustata subpetiolata ; floralia minora. Pedunculi floridi 6-9 lin. longi, axillares, apice umbellatim 
12-15 flori, pedicellis tenuibus 4-5 lin. longis. Flores illis Gomphocarpi fruticosi paullo majores. Calyx 
5-partitus, laciniis brevibus lanceolatis dense hispidis. Corolla patula, laciniis latis obtusis, crassiusculis, extus 
hirsutis, intus glabriusculis. Corona staminea gynostegio paullo brevior. 
PoLEMONIACEE. 
= 117. Gr1a capitata, Dougl. in Bot. Mag. t. 2698.; forma humilis, hinc inde puberula.— 
egas, 
118. Grit pharnaceoides, Benth. in Bot. Reg., sub tab. 1622.—Santa Clara. 
CoNVOLVULACE. 
119, Jacquemontta abutiloides, sp. n., humilis, undique molliter et dense tomentosa, foliis late 
ovato-cordiformibus acutis, pedunculis folio longioribus capitato-3-5-floris, sepalis ovato-lanceolatis 
acuminatis exterioribus paullo majoribus.—Bay of Magdalena. 
— exnipeaalens = pedalem, in speciminibus suppetentibus non volubilis ; ramuli tamen apice Jeviter 
flexuosi et forte in solo pinguiore volubiles evaderent. Ramuli, petioli, foliorum utraque pagina, pedunculi 
et sepala — — denso molli ferrugineo-flavescente vel subcanescente, e pilis substellatis intertextis 
constanite. Petioli mferiores laminam quant, superiores multo breviores. Folia majora vix pollicaria, 
crassiuscula, venis primariis subtus prominulis, acuta vel vix mucronulata. Pedunculi omnes folia superant. 
post anthesin bipollicares, apice flores ferunt tres vel rarissime quinque, subsessiles ad axillas bractearum Ba: 
subulatarum. Sepala omnia basi angustata vel rotundata nec cordata, multo minus quam in J. 
ineequales. Corolla fere J. violacew. Styli lobi oblongo-elliptici, divaricati, supra undique stipe 
violacea 
