Hab. Strait of Magalliaens ; Port Famine, Capt. King ; Hermite Island j Cape Horn, /. D. H.
A species entirely confined to South Chili, between Concepcion and Cape Horn. The four species enumerated in this work, together with U. erinacea, Pers. (a native of Valdivia and Chili) and two new ones *, diagnoses of which Dr. Boott has kindly given, include all the extra-tropical American Uncinia known to me.
2. Uncinia plileoides, Persoon, Synops. vol. ii. p. 534. Brongn. in. Buperrey, Yoy. Bot. p. 158 (excl. syn. U. Maclovianse) . Hook, et Am. in Bot. Yoy. Beechey, p. 50. Carex plileoides, Cav. Icon. vol. v. p. 40. t.464. f. 1.
Hab. Chonos Archipelago ; C. Darioin, Esq.
On several occasions I have alluded to the change which occurs in the vegetation of the western coast of South America, at, or about, the latitude of the Chonos Archipelago. This arises from many species extending to (but not crossing) that limit, both from much lower and higher latitudes, of which the present plant affords an example. U. plileoides inhabits the plain of Quito, under the equator, at an elevation of 8,000 feet ; it grows also at
1. Uncinia multiform, Nees ; spica crassa densiflora basi attenuata apice conico mascula nuda, stigmatibus 3, perigyniis (arista divaricata vix duplo brevioribus) linearibus ore truncato striato-nervosis scabris margine ciliatis squama oblonga obtusa pallida apice albo-membranacea ciliolata angustioribus longioribusque. Boott.
Hab. Chiloe, Cuming (n. 44. Herb. Hooker.)
Culmus subbipedalis, triqueter, firmus, lasvis, infeme foliatus. Folia 3-4 lin. lata, culnio longiora vel aequantia, glaucescentia, margine versus apicem facieque scabra, supremum angustum. Spica 2^ poll, longa, superne 6 lin. vel aristis divaricatis mensurata 10 lin. lata, basi attenuata, (1 lin. lata), nuda ; apice conico, (4 lin. longo), mascula. Squama oblongae, obtusae, pallidas, demmn fuscae, apice ciliolatae, albo-membranaceae, infra apicem
ferrugineo-zonatae, nervo dorsali vix prominente; mascidae breviores. Perigynium 3-|— | lin. longum, ^ lin. latum, biconvexum, superne praecipue scabrum, margine ciliatmn, pilis sursum longioribus demum fasciculatis, ore truncato ciliolato, arista 2 lin. extra os exserta, 5 lin. longa, divaricata, imo basi torta. Achanimn 2 lin. longum. -|lin. latum, triquetrum, utrinque sursum convexum, fuscum, impresso-punctidatum, apice et basi attenuatum. Stylus basi subincrassatus. Stigmata 3, non plumosa. Boott.
Ab U. erinacea, Pers., perigyniis linearibus diversa.
2. U. Bouglasii, Boott ; spica elongata lineari nuda apice mascida conformi, stigmatibus 3, perigyniis (arista A brevioribus) lanceolatis convexo-concaviuscubs basi obconico attenuatis ore truncato plurinerviis margine scabris superne pdis appressis utrinque exasperatis palbdis squama amplectente ovata aciuninata obtusa fiavescenti-viridi angustioribus sublongioribusque. Boott.
Hab. Ins. Juan Fernandez. Bavid Bovglas. {Herb. Hooker.)
Culmus bipedalis, gracilis, lsevis, nudus, basi foliatus. Folia 1-1| lin. lata, culmo longiora, utrinque margini-busque scabra. Spica 5-*— 6 poll, longa, Hneam lata, pars suprema mascida, subpollicaris, conformis. Squama ovatae, acuminatae, obtusae, amplectentes, flavescenti-vh'ides, striatae, margine pallide-ferrugineae, perigynio vix longiores, omnes confonnes. Perigynium 2^-3 lin. longum, lin. latum, lineai'e, hinc convexum, inde concaviusculum, basi obcomco-attenuatum, dorso pluilnerviiun, marginibus e basi scabrum, pilis sursiun longioribus, superne
pilis brevioribus appressis utrinque exasperatum, pallidum, lineolis ferrugineis maculatum, ore truncatum. Achanium If lin. longum, lin. latum, lineare, convexo-coucaviuscidum, facie dorsali linea centrali (angulo) notatum, castaneum, impresso-punctidatum. Arista 3-| lin. longa, pallida, filiformis, apice ferruginea, perigynio A longior. Stylus inclusus. Stigmatibus 3. Boott.
