In general appearance the present plant so closely resembles N. Gaudichaudii, that at first sight it is difficult to distinguish them. Cassini describes the flowers as apparently yellow; but Mr. Anderson, who collected the plant during Capt. King's voyage, mentions that they are white. The genus Triachne, remarks De Candolle, hardly differs from Nassauvia, nor can I find any character by which to separate them.
15. PANARGYRUM, Lag.
1. Panargyrum Darwinii, Hook, et Arn.; cæspitosum, basi ramosum appresse sericeum, ramis florentibus elongatis superne scapæformibus parce foliatis, foliis lineari-subulatis pungentibus integerrimis marginibus obscure revolutis, capitulis ad apices ramulorum capitato-congestis foliis subulatis bracteatis, pappo uniseriali plumoso. P. Darwinii, Hook, et Arn. in Comp. Bot. Mag. vol. ii. p. 43. an P. Lagascæ, DC. Prodr. vol. vii. p. 54?
Hab. Strait of Magalhaeus; Port Gregory, Capt. King.
Caules basi lignosi, ramis foliaceis 1-3-uncialibus, florentibus bis longioribus. Folia ½-⅓ unc. longa, sub 1-½ lin. lata, erecta v. sub-patentia, utrinque sericea. Rami florentis pars superior stricta, erecta, teres, sublanuginosa. Capitulorum fasciculus ½—1 unc. diametro. Corollæ conspicuæ, albidæ?
A very distinct species, also found at Port Desire by Mr. Darwin. The woody group of Nassauviæ, to which the present plant belongs, is nearly peculiar to South America, and to the drier parts of that continent, especially of South Chili and Patagonia; they do not cross the Strait of Magalhaens on the western side, but on the east a few stretch down to Port Gregory, Staten Land, and the Falkland Islands. I have appended the description of an allied Patagonian plant, which forms a new genus.[1]
2. Panargyrum abbreviatum, Hook, et Arn.; cæspitosum, glabriusculum, basi ramosum, substoloniferum, foliis imbricatis rigidis patenti-recurvis linearibus acuminatis mucronatis integerrimis glaberrimis basi vaginantibus axillis sericeis, capitulis ad apices ramorum congesto-capitatis sessilibus, pappo plumoso. P. abbreviatum, Hook, et Arn. in Comp. Bot. Mag. vol. ii. p. 43.
Hab. Strait of Magalhaens; Port Gregory, Capt. King.
Rami unciales, suberecti v. prostrati, foliosi. Folia ½ unc. longa, planiuscula v. super concava, dorso medio costata, superiora interdum subspathulata, marginibus incrassatis, vagina basi subciliata. Capitulorum fasciculus hemisphæricus, 1 unc. diametro. Pappus involucrum superans plumosus.
I have seen only one specimen of this species, gathered by Capt. King; it is very distinct from its congeners.
- ↑
- TRIANTHUS, N. G.
Capitulum radiatiforme, compressum, æqualiflorum, sub3-florum. Involucrum biseriale; squamis paucis; exterioribus ovato-lanceolatis, acuminatis, pungentibus, carinatis; interioribus 1-2, planiusculis, lineari-oblongis, acuminatis. Receptaculum parvum, nudum, papillosum. Flores hermaphroditi. Corolla labio exteriore late oblongo, apice tridentato; interiore linguæformi, revoluto, integerrimo. Achænia ob-pyramidata, erostria, villosa. Pappus 1-serialis, paleaceus, caducus; paleis 3-5, linearibus, angustis, inferne gradatim attenuatis, apice acutis, marginibus ciliato-plumosis.—Herba lignosa, depressa, ramosa, glabriuscula, Triptilioni affinis. Folia subulata, patenti-recurva,pungentia, basi imbricata, late vaginantia, coriacea. Capitula ad apices ramulorum solitaria, inter folia sessilia. Corollæ albidæ.
1. Trianthus ulicinus, Hook. fil.
Hab. Patagonia; Cape Fairweather, Capt. King.
