Senecio.] 
composite. 
179 
£ in. long ; scales about 15, linear, naked ; several small lax outer ones 
at the base. Flowers yellow, about 30 in a head ; outer with an oblong 
ligule i in. long. Achenes T V in long, cylindrical, glabrous ; pappus 
£ in. long, of pure white soft caducous hairs. 
Island of Rodriguez, plentiful, Bouton ! Duncan ! Dr. Balfour ! Endemic. 
S. linearis , DC. Prod. vi. 37 5, “ex insulis mauritianis,” which I have not seen, 
must he very near this. It is said to have entire or subdenticulate leaves -§- in. 
broad, the upper half-amplexicaul, few heads in a lax corymb and involucre without 
any minute outer basal scales. 
5. S. Lingua, Poir. ; DC. Prod.Y i. 375. Apparently perennial. 
Stems firm, branched, terete, glabrous. Leaves petioled, entire, lingu- 
late, obtuse, J-f in- long, £ in. broad, subacute at the base, rather fleshy. 
Corymb of few heads on an elongated scaly peduncle. Involucre gla- 
brous, the scales lanceolate with a membranous border. Heads the 
thickness of those of S. vulgaris , but shorter, the outer flowers ligulate, 
all yellow. 
Mauritius, gathered by Commerson. Described by Poiret from a specimen of 
Desfontaines. Unknown to Bojer and the recent resident botanists. Endemic. 
6. S. Ambavilla, DC. Prod. vi. 376 A much-branched glabrous 
shrub, with very slender crowded ascending branchlets. Leaves 
sessile, lyrate-pinnate, subcoriaceous, glabrous, with a large linear 
inciso-dentate terminal lobe an inch or less long, i in. broad, sub- 
obtuse, cuneate at the base, and 2-3 crowded spreading minute linear 
entire lobes at the base. Heads in dense terminal corymbs. Involucre 
funnel-shaped, £ in. long ; scales 8-10, glabrous, linear, with a deltoid 
tip ; outer at base 1-2, minute. Flowers 12-15 to a head, yellow ; 
outer with a ligulate ray J in. long. Achenes in. long, angular- 
cylindrical ; pappus as long as the achene, of copious rather firm 
ciliated white hairs like those of Faujasia. Hubertia Ambavilla, Bory, 
Voyage , i. 334, tab. Vk y fig. 1. 
Mauritius, a specimen in the Kew collection from Baron Delessert, said to have 
been gathered by Commerson, but there may have been some mistake about the 
island, as it is a well-known Bourbon species, and has not been seen in Mauritius by 
Bojer or the recent local botanists. 
There is a specimen in the Kew herbarium from Delessert of Eriothrix lycopodioides , 
DC. Prod. vi. 293, labelled as gathered by Commerson in Mauritius, but as it is a plant 
well-known in Bourbon, and no one else has found it, I fear an error, as in the case 
Senecio Ambwvilla. It is a small rigid erect shrub of the hill-tops, much-branched 
dichotomously, with densely imbricated ascending linear-subulate coriaceous leaves 
under 1 in. long, heads at the end of the stem without any involucre than a whorl 
of ordinary ascending leaves and minute heterogamous tubular florets emerging 
from a dense white woolly mass formed by the multiserial pappus of the cylindrical 
achenes. 
22. LACTUCA, Linn. 
Heads of numerous yellow flowers, all ligulate and fertile. Invo- 
lucre campanulate ; scales herbaceous, 2-3-serial, imbricated. Receptacle 
flat, naked. Anthers sagittate at the base, not tailed. Style-arms 
n 2 
