168 
CONTRIBUTIONS TO BOTANY. 
becomes line in length. The fructiferous spikelets, upon a 
distinct plant, supported by a peduncle 2 to 4 lines long, are 3 
to 3^ lines in length, and are formed of three pairs of imbricated 
involucels, with a pair of bracts upon the peduncle. The two 
terminal achenia, embraced by the last pair of involucels, which 
are somewhat shorter than them, and suhscarious, are plano- 
convex, ohlong, pointed towards the small perforated apex, where 
they are marked by a small yellowish glandular ring which I 
have considered to be the persistent sessile stigma; the exserted 
portion of the tubillus is barely a line long, and is irregularly 
lacerated and scarcely 2-lobed*. 
5. Ephedra dumosa, n. sp. ; — ramis arcuato-flexuosis, valde ra- 
mosis et intricatis, internodiis subbrevibus aut mediocriter 
distantibus ; ramulis divaricatis, striatellis, granuloso-scabri- 
dulis, rufescentibus vel fuscis ; folds oppositis, coriaceis, 
granuloso-striatulis, fusco-rubescentibus, imo in vaginam 
amplam brevem connexis, vix marginatis, apicibus breviter 
mucronato-acutis, vagina demum rupta linearibus : spicellis 
fructiferis solitariis, brevissime pedicellatis ; involucellis per 
paria imo nexis, imbricatis, ovatis, subcarnosis, rubescentibus, 
achenia omnino amplectentibus ; acheniis nigris, nitidis, tu- 
billo breviter exserto, obsolete 2-lobo. — In Andibus Chilensi- 
bus, V. V. ad Cortaderas costa orientali ; v. s. in herb, meo et 
Hook., Cuesta del Inca (Gillies). 
A low bushy shruh, which I found growing near the Ladera 
de las Cortaderas, on the eastern side of the Andes, and of which 
1 still preserve the ripe fruits, though my specimen was lost. I>r. 
Gillies^s plant, from the eastern side of the Portillo Pass, is more 
dwarfish, and is without flower or fruit. The branchlets are 
opposite, the internodes being only 6 to 12 lines apart; the 
vaginant portion of the combined opposite leaflets is ^ line long 
and subcampanulate, the segments being of equal length, and 
triangular. The fructiferous spikelets are solitary, 3 lines long, 
2 lines in diameter ; the involucels, broad and very fleshy, of a 
dull dark ruddy hue, quite conceal the two terminal achenia: 
the latter are ovate, diminishing upwards, planoconvex, shining, 
unevenly striated, each ohtuse at its acumination, where it is per- 
forated and surrounded by an apical annular gland ; the tubillus, 
rising through this, is very little exserted, and very hriefly hifid, 
or rather lacerated into two very short, erect, concave, rounded, 
unequal lobes t* 
* A representation of this species, with ample details, is given in Plate 
76 B. 
t This plant, with analyses of its carpological structure, is shown in 
PI. 77 a. 
