CONTRIBUTIONS TO BOTANY. 
165 
long, 2^ lines broad ; the petaloid perigonium in eaeh involucel 
is turbinately tubular, eompressed, delicately membranaceous, of 
an orange-yellow colour, 1 line long (thus somewhat exceeding 
the length of its involucel), its border consisting of two rounded 
concave, erect lobes, which are imbricated in aestivation in the 
manner before described; the exserted anthers are subglobose, 
of a bright yellow colour, opening by two pores in the apex. 
The female peduncle is 10 lines long, bearing spikelets in which 
the achenia were destroyed hy insects*. 
2. Ephedra bracteata, nob. Trav. ii. 531 ; — ramis erectis, ramulis 
ternatim verticillatis aut oppositis, tenuioribus, divaricatis, 
fusco-viridibus, minutissime granuloso-striatellis, internodiis 
longiusculis ; folds oppositis, rarius ternis, imo in vaginam 
submembranaceam connatis, apicibus longissime et anguste 
linearibus ; inflorescentia c? et $ interdum in eadem planta ; 
spicellis d 2-3 in quaque axilla subsessilibus, imo bracteatis, 
involucellis 1-floris, per paria 6-8 imo connatis decussatim 
imbricatis, perigonio involucello paulo longiore, flavido, peta- 
loideo, antheris 6 sessilibus longe exsertis ; spicellse 5 involu- 
cellis imbricatis, majoribus, coriaceis, marginellatis, achenia 
2 collateraliter terminalia ultra medium velantibus. — Chile, 
Prov. Valparaiso et Coquimbo, v.v. ad Concon; v.s. in herb. 
Hook., Vina de la Mar ( c? & ? Bridges, No. 178), Vina de la 
Mar (Anderson, anno 1830), Coquimbo (Harvey cJ). 
A shrub growing to the height of 2 to 5 feet, with the habit 
of the preceding, from which it differs by several marked cha- 
racters. The branches are more slender, darker, with internodes 
1;^ inch apart; the leaflets are opposite, sometimes ternate, 3 to 
4 lines long, united at base into a vaginant tube 1 line in length, 
the segments being somewhat erect and linearly setaceous. The 
male spikelets are 2^ lines long, 1| line broad, formed of two 
sets of basal bracts and six or eight pairs of floriferous decussately 
imbricated involucels, united into as many vaginant sheaths at 
their bases ; the perigonium of each solitary opposite flower is 
of a yellow colour, 1 line long, with a two-lobed erect border ; 
the staminal tube is 1^ line long, supporting the subsessile sub- 
globose yellow anthers, which open by two pores in the apex. 
The fructiferous spikelet is 3 lines long, 2 lines broad, formed 
of four series of imbricated involucels void of flowers ; they are 
coriaceous, line long, 1^ line broad, each united with the oppo- 
site one into a sheath at its base ; the two terminal achenia, more 
than half invested by the superior involucels, are 2 lines long, 
1^ line broad, flat on the contiguous faces, and convex externally, 
* A drawing of this species, with analytical details, is given in Plate 75 a. 
