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100 UNITED STATES AND MEXICAN BOUNDARY. 
HEMIZONIA RAMOSISSIMA, Benth. Bot. Voy. Sulyh. p. 30. Santa Barbara and San Diego, Cali- 
fornia; Schott, Fitch. This appears to be a common Californian plant, of somewhat variable 
mode of growth. Mr. Fitch's specimen is the same as Frémont’s, marked R and 8 in his coll. 
of 1846; as No. 361 of Coulter’s Californian collection ; and as the Л. fasciculata of Nuttall, in 
herb. Hook; (of Gambell’s collection, a stricter and smoother form) ; I believe it is also Bentham's 
H. ramosissima. 'The sessile or stipitate glands are sometimes abundant, but not rarely wanting 
or nearly so. I may remark that to H. angustifolia, DC., (which has no pappus at all, at least 
in Douglas’s specimens,) belongs the H. multicaulis, Hook. & Arn. Bot. Beech. Voy. Suppl., p 
355 ; the No. 305 of Coulter's Californian collection ; H. decumbens, Nutt. Pl. Gamb. p. 175 ; and 
apparently the same as specimens gathered near Mozterey by Mr. Barclay, although their disk- 
flowers show a minute pappus. But No. 1797 of Hartweg's collection, referred by Mr. Bentham 
to H. angustifolia, is exactly H. corymbosa (Hartmannia corymbosa, DC.) H. macrocephala, 
Nutt. Pl. Gamb. 1. c., appears to be the same species. Н. congesta, DC., is to be distinguished 
from Madaria chiefly by the shape of the fertile achenia ; as noted in the Botany of Whipple's 
Report.* 
CALYCADENIA (OSMADENIA) TENELLA, Torr. & Gray, Fl. 2, p. 402. Osmadenia tenella, Nutt. 
Dry places near San Diego, California; Parry, etc. ; June. Subjoined are the characters of 
two new species, from Frémont's Californian collection of 1846. They belong to Nuttall's 
Osmadenia, but have the glands of Calycadenia on the floral and young fascicled leaves, and 
*Besides H. Fitchii, recently published in темен s Report, there is another extremely well marked species of Hemizonia тп 
Colonel Frémont's collection, the characters of which a bjoined : 
HEMIZONIA viRGATA (sp. nov.) : subglabra ; caulibus e radice annua ramisve simplicibus gracilibus ; foliis linearibus, inferi- 
oribus inciso-dentatis basi longe attenuatis, superioribus integerrimis, summis minimis apice glanduloso-truncatis ; capitulis ob- 
longis in axillis solitariis subsessilibus vel plerumque ramulos breves foliosos desinentibus racemum virgatum efficientibus ; invol- 
ucri squamis circiter 5 ovatis membranaceis cum paleis extimis receptaculi glandulis stipitatis’ mollibus dorso muricatis ; floribus - 
ut videtur luteis, radii 5 ligula euneato-rotunda apice triloba, disci 10 sterilibus, singulis palea oblonga glanduloso-mucronata 
amplexatis epapposis ; acheniis radii fertilibus obovatis levibus basi substipitatis apice intus breviter rostratis,— California, prob- 
ably on the Sacramento; Col. Frémont.—Stems a foot or more high. Lower cauline leaves two inches long, the upper ones an 
inch or less in length and barely a line wide; those fascicled in the axils or crowded on the floral branchlets 1-2 lines wide, 
spreading ; their truncate apex glandular. Heads З lines long. Scales of the involucre ovate, cymbiform, half inc'osing the 
fertile achenia, glabrous, beset externally with long and soft glandular-tipped but truncate spreading processes. Ligules 2 lines 
long and the same width, on a glandular tube of a line in length. Disk-flowers slightly glandular, their infertile ovaries glab- 
rous, destitute of pappus。 Receptacle chaffy thonghout ; the pales distinct, membranaceous. 
орага rms Хул поу. Ae аи humili — dens — à et ree dn ri xp — sca- 
ispi ulis 
solitariis tertiinalibus кайый е сабе ; š ligalis 5-7 ийели; жемесе "н! brevissimo glabra 9-3-plo longi- 
oribus ; disco circiter 20-floro ; paleis receptaculi 12 et ultra oblongis obtusi m disci ovatis ; 
acheniis radii levibus utrinque obtusis, disci hirsutulis pappo 10-paleaceo (тайды: alternis бак рейдин) aequilongis. —Cali- 
fornia, (the particular station not recorded ;) Col. Fremont. Stems a span high, from an annual root, erect, rather slender ; the 
branches are not glandular nor glutinous. Cauline leaves an inch or more in length, the lower opposite. Heads few, larger, 
and with many more flowers than in C. tenella ; also with much ampler ligules, (though the tubular portion is very much 
shorter,) their obovate or oblong segments 3 lines long. Nor are the tinged and perfectly smooth and even ray achenia at all 
apiculate at either end. The pappus of the (apparently fertile) disk-achenia resembles that of C. tenella, its longer and subulate 
scales being only haif the length of the corolla, and not longer than the achenium itself. 
: д РЗ кпе, рег :1 A : capitula 
CALYCADENIA PAUCIFLORA (fp. nov. ) : caule paniculato-ramoso glabello ; 
solitaria reram "4 эрэн singulos gerentibus ; foliis anguste linearibus scabris inferne асері — cum iis in 
axillis fasi glandula claviformi superatis ; radio uni-ligulato, lobis ligule t disco 
ае rir 2 тт کے‎ POESIE, 
