! *
ti 3
This has quite the appearance of a Eilago, but the straclure of the capitulum is that of Gnaphalium iu
every particular, except as regards the receptacle, which is here conical and densely covered with large cyliii-
drical papillæ that are concave at the apex. The filiform female florets form about two rows, within which
are the bisexual ones.
1. Senecio arnicoides. D e Cand. Prod. 6. p . 426.
This we have not seen.
2. S. Californicus. De Cand. Prod. 6. p . 426.
3. S. ? flocciferus. D e Cand. Prod. 6. p . 426.
The flowers are reddish, the ligulate florets appear to be in several rows and gradually to pass into the
tubular ones.
4. S. Douglasii. D e Cand. Prod. 6. p . 429.
With this we are unacquainted.
TETRADYMIA. D e Cand. L a g o t h a m n d s . N u tt. ms.
Capitulum homogamum pauciflorum. ZntioZKm squamæ subbiseriales, ovali-oblongæ, coriaceo-paleaceæ. R e ceptaculum
angustum nudum epaleaceum. Corollæ tubulosæ 5-fidæ, lobis linearibus recurvis. Anthercc
exsertæ ecaudatæ. Sty li rami teretiusculi apice incrassati cono brevi superati. Achenia erostria villosa.
Pappus corollæ tubum æquans pluriserialis, pilis mollibus basi fragilibus candidissimis spinuloso-denticu-
latis.—Herbæ vel frútices. Caules fo lia primaria pedunculi et involucra tomentoso-cana. Folia alterna
rigide mucronata. Capitula 5-8 a d apices caulis vel ramulorum in racemum confería. Flosculi “ lutei
multo majores quam in Senecionum genere ad quod genus nostrum accedit."
\. T . canescens {De Cand.); herbácea, foliis omnibus linearibus planis erectis mucronulo
brevi apiculatis cano-tomentosis in axilla nullis, involucro 4-phylio 4-floro De
Cand. in D e Le ss. Ic . Sel. 4. t. 60 (ined.). Prod. 6. p . 44 0 Lagothamnus. Nu tt. Mst.
f d e herb. Dougl.
We do not know where Douglas and Nuttall collected their specimens ; De Candolle says they are from
the Columbia River, but they came to us with plants from California.
2. T . spinosa; fruticosa, foliis primariis (seu rameis) tomentosis subteretibus recurvis
rigidis spinoso-mucronatis senioribus glabrescentibus omnino spiniformibus, axillaribus
fasciculatis carnosulis glabris obtusiusculis, involucro 5-(n u n c 4-)phyllo 8-floro.
H a b . Snake Country. M r Tolmie.
1. C e n ta u re a Melitensis. L in n .— De Cand. Prod. 6.p . 593 C. c d. L am . ? De Cand.
I. c.— C. Patibilcensis. De Cand. I. c.
Between the above three supposed speeies, as defined by De Candolle, we can perceive no difference.
C. Melitensis is said to have capitula solitary and tomentose. and the cauline leaves toothed ; in C. apula
the capitula are usually aggregated and glabrous, and the cauline leaves quite entire ; while C. Patibilcensis
has the leaves of the latter aud involucres of the former. But from a comparison of specimens, from Europe,
the Cape of Good Hope, the Canary Isles, Monte Video, Chili, and California, these characters vary on the
same specimen j and we have no doubt whatever that the species has migrated with grain from the south
of Europe. De Candolle refers Douglas’ plant to his C. Melitensis, although the cauline leaves (in our
specimen) are quite entire.
1. Acourtia microcephala. D e Cand. Prod. 7. p. 66.
1. Calais Douglasii {De Cand.); scaposa glabriuscula, foliis lineari-lanceolatis remote
pinnatifidis, segmentibus linearibus brevibus, pappi paleis 5 basi dilatatis adpresse villosis
sensim in arislam longam acuminatis, acheniis disci adpresse villosis radii ad costas
scabris.—De Cand. Prod. 7. p . 85.
De Candolle refers to this genus the Hymenomena of Hooker Flor. Bor. Am. The two species, however,
which are there described, differ from De Candolle’s character, by having the paieæ of the pappus at least
twice as numerous, the dilated part at the base not scariose, much smaller and nearly inconspicuous, while
the bristle into which it passes is more slender, much longer, and pure white; the involucre, moreover, is
decidedly imbricated, like that of Scorzonera or Troximon, and tho achenia short, glabrous, and not attenuated
at the apex.
2, C. linearifolia {De Cand.); subscaposa vel caulescens basi foliosa puberula, foliis
linearibus integerrimis vel pinnatifidis laciniis lineari-acuminatis, pappi paleis albis
glabris longe scariosis apice bifidis e sinu setam brevem proferentibus, acheniis striatis
omnibus glaberrimis muriculatis.—De Cand. Prod. 7. p . 85 (excl. syn.).— C. Lindleyi.
D e Cand. ? I. c. (excl. syn.).
C. Lindleyi seems merely a cultivated form of this species. In the native specimens the leaves are either
quite entire or almost pinnatUpartite. The pappus is so different from that of C. Douglasii, that we should
scarcely have referred the two plants to the same genua ¡ or if they be considered congeners, the character
might be so modified as to admit also the two species of the Flor. Bor. Am.
1. Macrorliynchus Lessingii {Hook, et A rn .)— Borkhausia Lessingii. Hook, et Arn.
supra, p . 145.—Troximon apargioides. L e s s .— De Cand. Prod. 7. p . 252.
In addition to the description we have already given in this work, we may state that the achenia are fusiform,
deeply striated with ten furrows, the ribs obtuse and not winged ; the filiform stipes of the pappus is
nearly thrice the length of the achenium, and dilated at the apex into a small disk. The achenia and pappus
of the outer and inner florets are precisely alike. Having published our former notice before we were
acquainted with Lessing’s Synopsis of the genera of this order, we placed this in Borkhausia; but now that
that genus has been separated into others, the Californian plant must unquestionably be removed to the same
as tho Chilian species. We may here state, that under the name of M. Chilensis, we, in the Comp, to the
Bot. Mag., l .p . 81, and II. p . 42, intended to include all the Chilian species of DC., nor are we yet certain
that they are really distinct ; but, with reference to Fischer and Meyer, as well as De Candolle, our specimens
from Valparaiso (Mathews, No. 306, and Cuming, No. 745), as also from Falkland Island, belong to
M. pterocarpus, and that from Viña de la Mar, near Valparaiso, marked “ Bridges, No. 500,” is M. loevigatus.
As to Bridges’ No. 501, the achenia are too young to show whether the costæ ought to be considered alæ
or not. In several achenia in Mathews, No. 306, we have observed some of the costæ quite obtuse and
corky, while others were alate.
1. Melacothrix Californica. De Cand. Prod. 7. p . 192.
1. Sonchus? Californicus; herbaceus glaber, caule elato fistuloso simpliciter ramoso
striato, ramis longiusculis monocephalis, foliis lanceolato-linearibus a ttenuatis denticulatis,
rameis integerrimis, involucro hemispherico, squamis interioribus subæqualibus erectis
subbiserialibus, exterioribus minoribus squarroso-patulis, pedúnculo apice squaniato.
2 z