6 BOTANY. 
ZYGOPHYLLACEA. 
Larrea Mexicana, Moric. in Gray’s Gen. Ill., vol. 2, T. 147; L. glutinosa, Engelm. App. 
Wisliz., p. 93. Zygophyllum tridentatum, D, C.,1 Fl. Mex. A very common resinous shrub, 
known in the far west by the name of kreosote plant, on account of its very strong smell. The 
resin of this shrub, collected by the Pimos Indians, is formed by them into balls which they 
kick and send before them with their feet, as they journey from one point to the other of their 
trail. 
MALVACEE. 
SmpaLcEA MALVEFLORA, Gray’s Pl. Wright. part 1, p. 16; 8. Neo-Mexicana, Gray’s Pl. 
Fendl., p. 23, Sida malveeflora, Moc. and Sesse. Posé creek ; September. 
MALVASTRUM MARRUBIOIDES, nova species. Circa bipedalis erecta, tomento stellato albida. 
Folia petiolata, late-ovata basi truncata vix, triloba, crenato-dentata, subtus reticulato-venosa. 
Stipule lineares. Calycis laciniis ovato-lanceolatis acuminatis. Flores glabri rosei, in paniculis 
brevibus axillaribus 3-5-floris glomerati ac in spicam terminalem desinentes. 
Plant erect, about two feet high, covered with a dense stellate tomentum, of two different 
sizes, that gives it a pale color and a sandy feel. Leaves petiolate, broadly ovate, truncate at 
the base, subtrilobate, crenate-dentate, reticulately veined underneath. Stipules linear. Seg- 
ments of the calyx ovate-lanceolate acuminate. Flowers smooth, rose colored, glomerate in 
short panicles of 3-5 in the axils of the leaves and merging into a terminal spike. Fort Miller, 
July. 
LEGUMINOSZ. 
HOoSACKIA LATHYROIDES, nova species. Herba cespitosa, basi ramosa, caulibus subflexuosis, 
minute pubescens. Folia imparipinnata, foliolis 5-7 lineari-lanceolatis utrinque acutis. Stipule 
minute scariose ovate acuminate. Umbdelle 1-3-flore, bracted lineari-lanceolaté in parciori- 
bus.. Flores subsessiles 5’” longi, flavi, calycis dentibus lineari-acutis. 
Herbaceous and cespitose, branching near the base, rather flexuose, minutely pubescent. 
Leaves imparipinnate ; leaflets 5-7 linear-lanceolate, acute at both ends. Stipules rudimentary, 
membranaceous, ovate acuminate; umbels 1~3-flowered ; bract (only on the poorer umbels) 
linear-lanceolate. Flowers 5’” long, light yellow; teeth of the calyx linear-lanceolate. 
Resembles somewhat the figure of Lotus pinnatus, Hook. in Bot. Mag. T. 2913, than which, 
however, it has longer and narrower leaves. Fort Miller, on the banks of San Joaquin river ; 
August. : 
Hosackra Heermannt, H. dectmbens, var. glabriuscula? Hook. & Arn. in Torr. & Gray's Fl. 
vol, 1, p. 324. Suffrutex sat regulariter ramulosus, omnino puberulus, 13-2 pedalis. Ramuli 
tenues subflexuosi foliosi umbellosi, internodiis foliorum fere son ceanaieiica Folia fere omnia 
umbellam in axillo gerentia—imparipinnata, foliolis 3-5 alt til boideo-ovatis acutis 
mucronulatis pubescentibus ; stipulis minutis fusiformibus rubioundis lanugine alba celatis. 
Umbellarum pedunculi rachidis folii fere longitudine, 2-4~6-flori foliolumque solitarium ferentes. 
Flores subsessiles. Calyx campanulato-tubulosus pubescens, laciniis acutissimis. Corolla parva 
flava, petalis gracilibus obtusis, apice fusco-purpurascentibus. Legumen pubescens, pendulum, 
incurvum, rostro subrefracto subulato apice uncinato vixque dimidia leguminis longitudine. 
Semina 1-2. Ab, H. decumbente distinguitur forma ramosiore ac pubescentia densiore, foliis 
mucronulatis, stipulis haud spinosis, umbellarum — multo ge boii flore minori 
apice purpurascenti leguminibusque ecarinatis, 
