FLORA ANTARCTICA.
tato, sub-bilabiato, dentibus obtusis, 1 reliquis sub-duplo longioribus. Stylus incrassatus, cylindraceus, exsertus,
basi bulbosus, bifidus, ramis ovato-oblongis obtusis marginibus apiceque stigmatiferis. AcJienium calvum, late
obovatum, apice retusum, extus planiusculum, intus carinatum, carina marginibusque celluloso-incrassatis.—
F l. Masc. Corolla tubulosa, clavata, subtetragona, angulis incrassatis linea elevata cellulosis, 4-dentata, dentibus
acutis erectis æqualibus. Stamina 4 ; filamentis ima basi coroUæ insertis, angulis incrassatis alternantibus ; antheris
vix ac ne vix liberis, basi breviter productis. Stylus exsertus, basi (ut in fl. foem.) bulboso-incrassatus,
apice capltato truncato obscure bilobo. Achoenium parvum, vacuum.—Herba repens laxe cespitosa, ramosa, gla-
berrima, ad terram montibus insulai-um Auckland et Campbell obvia. Folia alterna. Capitula inconspicua in ramis
ultimis, primum interfolia sessilia, demum pedunculis proprUs ultra folia productis apice foliiferis elevata. Flores
fasco-purpm-ascentes. Folia spatkulata v. lineari-spatkulata elongata.
1. T b i n e u r o x spathulatum, Ho o k . fil. (T a b . X V II.)
H a b . L o rd A u ck lan d ’s g ro u p an d Campbell’s Is la n d ; on p e a ty soil, n e a r th e summits o f th e
m o u n ta in s , a lt. 1 2 0 0 -1 4 0 0 feet.
Caulis breviusculus, 1-2 unc. longus, sublignosus, repens, fibras copiosas validas elongatas per totam lon-
gitudinem emittens, et reliquiis foliorum vetustorum undique tectus, superne parce ramosus ; ramis brevibus
ascendentibus erectisve foliosis ultra folia in pedunculum nudum apice floriferum productis. Folia basi imbri-
cata, undique patentia, lineari-spathulata, glaberrima, integerrima, plus minusve elongata, J -1 unc. longa, obtusa,
3-5-nervia, plana, subcamosa, læte viridia. Capitula parva, subsolitaria, vel 3 -4 aggregata, júniora valde
inconspicua, inter folia occulta, demum pedunculata ; pedúnculo ^-1 une. longo, apice folioso, foliis 2-3 reliquis
longporibus. Flores minimi, vix y lin. longi, sub lente pulcbre rubro-purpurei.
A very remarkable genus, most nearly allied to Abrotanella, Cass. {Oligosporus emarginatus, Gaud, in Ann.
Sc. Nat. vol. V. p. 104. t. 3. fig. 4), but of a very different habit, and in many other particulars quite distinct,
especially in the more numerous scales of the involucre, inserted in two series, in the many-flowered capitula,
the quadrifid corollas of the ray, the curious tetragonous corollas of the disc, and the thickened cellular structure
which exists in several parts of this plant. Besides the achænia having a thickened border and keel in front,
formed of large lax transparent cells, the incrassated angles of the male flowers and the three nerves of the
involucral leaves, exhibit the same singular character. In both the latter cases, the substance of the organs
themselves, which are opake and fleshy, seems to be divided by broad lines of a transparent substance, marked
with transverse septa.
Many of the discoid Senecionidee, and especially in the tribe Hippie of Lessing, are remarkable for the
curious and anomalous structure of their inflorescence. In several instances, as in the present, it may be
doubted whether the flowei-s of the ray are really tubular, the general unequal division and oblique aperture
of the mouth appearing to indicate their true structure as either ligulate or 2-lipped ; 2-lipped perhaps in the
present and tbe following genus, and assuredly 1-lipped or ligulate in Abrotanella, where I observe the three teeth
all to point towards one side of the tube, with the middle one the longest. The teeth in this species have the
margins thickened, and apparently revolute. The base of the style is peculiarly incrassated, especially in the
female flower, having the base of the corolla swollen around it, and the thickened portion often forms a
depressed sphere, in which the style seems to be inserted, and it sometimes assumes the appearance of a fleshy
ring or corona, surmounting the top of the ovary.
The name is adopted in allusion to the three cellular nerves or lines of the ovary and involucral scales.
Plate XVII. Fig. 1, capitulum ; fig. 2, scale of the involucrum ; fig. 3, side view, and fig. 4, front v iew of
flowers of the ray ; fig. 5, back, a n d /y . 6, front vdew of ripe achænium ; fig. 7, style of a flower of the ray, with
its bulbous base ; fig .8, flower of the disc; fig. 9, stamen, and/jr . 10, style from the same : all magnified.
2. C E R A T E L L A , Hook. fil.
Capitula aggregata, singulo 8-10-floro ; floribus exterioribus sub 8, foemineis, 1-serialibus; interioribus abortu
masculis, omnibus, ut videtur, tubulosis. Involucrum 8-10-phyllum, squamis biserialibus coriaceis subacutis
valde inæqualibus, interioribus linearibus 1-3-nerviis angustatis, exterioribus foliaceis latioribus plurinerviis.
nervis omnibus cellulosis pellucidi» transverse septatis. Receptaculum nudum, angustum, minutum, planiusculum
vel subconicum, foveolatum. F l. Foem. Corolla tubulosa, elongata, basi globosa, ore profunde 4-dentato,
dentibus majusculis subinæqualibus oblongis obtusis concavis medio macula oblonga pallida cellulosa pellucida
deorsum in lineam extensa. Stylus validus, exsertus, basi bulbosus, apice breviter bifidus. Achænium com-
pressum, tetragonum, anguste tetrapterum, alis membranaceis, oblongo-obovatum, 4-cornutum, comubus brevibus
divaricatis, 2 exterioribus sublongioribus. F l . Masc. Corolla tubulosa, lineari-clavata, 3-4-dentata, sub
3—4-angulata, angulis pellucidis, dentibus concavis, dorso macula pellucida et linea extensa, u t in fl. foem. A n there
latiusculæ, inclusæ, basi breviter biaristatæ, apice apiculatæ, flavæ. Stylus validus, cylindraceus, corolla
^ brevior, apice sensim latiore abrupte truncato margine crenato. Achenium obscure 4-gonum, parvum.
vacuum omnino calvum.—HQThs. pusilla, dense cespitosa, Androsacis/ûcfe, rupibus preruptis ad cacumîna montium
insule Campbell proveniens. Folia alterna, densissime imhricata, stellatim patentia. Capitula aggregata, inter
folia summa sessilia. Flores purpurascentes, parvi, inconspicui.
1. C e r a t e l l a rosulata, H o o k . fil. (T a b . X V I I I .)
H a b . Campbell’s I s la n d ; in crevices o f rocks a t tb e to p s o f th e m o u n ta in s , a t an elevation o f
1400 fe e t; v e iy sp arin g ly .
Caules dense pulvinati, ramosi, duri, rigidi, 1-1^ unc. longi, validi, inferne foliis vetustioribus dense obsiti,
fusco-nigrescentes. Folia arete imbricata, stellatim patentia, coriacea vel subcomea, superiora rosulata, basi
latiore vaginante scariosa, medio contracta, deinde ovata, acuta, plus minusve concava, subtus striato-nervosa,
marginibus acuentibus, superiora gradatim minora, 2-3 lin. longa, intense viridia, ietate fusco-tincta. Capitula
in summos ramos 8-10, congesta, brevissime pedunculata, inconspicua. foliis subtensa, 2 lin. longa. Involucri
sqxiame irregulariter insertte, ovato-oblongge, subacutae, concavae, nervosse, nervis (ut in Trinew'o') celluloso-incrassatis
transversim septatis pellucidis, interiores angustiores. Flores parvi, purpurei.
This plant is perhaps more closely allied to the last genus (Trineiiron) than to any other, and exhibits many
remarkable points of affinity with it, especiaUy in the pellucid thickened parts of the flower and nerves of the
involucral leaves; likewise the general structure of the capitula, corollas, stamens and styles is much alike in
both. But while so many instances of resemblance exist, the totally different nature of the achainium becomes
the more striking. In the tufted habit, harsh, coriaceous, even horny texture, the plant is more allied to Abro-
tanella emarginata.
These three genera form together a small group, allied in several respects to Hippia, Lessing, but naturally
distinct, all the species of tliat division being herbaceous, more or less odorous, and often even furnished
with pellucid glands.
The name is derived from the little horn-like processes of the achcenium.
Plate XVIII. Fig. 1, a head of capitula ; / y . 2, single capitulum, removed ■, fig .S . receptacle and involucral
scales ; fig. 4, a flower of the r a y ; fig. 5, the same cut open ■, fig .S , achienlum ; / y . 7, a 3-toothed flower of the
disc ; f,g. 8, the same, with four teeth -.fig .S , the same cut open, and / y . 10, a stamen from do. all magnified
Capitulum
VOL. I.
.3. L E P T IN E L L A , Cass.
3 floruin, hetcrogamum ; floribus exterioribus foemineis bi-triserialibus, disci abortu masculis tu-
E