Lactuca| LXXI, COMPOSIT. 619 
79. LACTUCA Tournef., L.; Benth. & Hook. f. Gen, Pl. ii. p. 524. 
1. L. goreensis Schultz Bip. in Flora xxv. p. 422 (21 July 
1842); O. & H. in Oliv. Fl. Trop. Afr, iii. p. 452. 
Sonchus gorensis Lam. Encyl. Méth. iii. p. 397 (1789) ; non Less. 
Launea goreensis O. Hoffm. in Engl. & Prantl, Nat. Pflanzenfam. 
iv. 5, p. 370 (1894). 
Loanpa.-—An annual erect herb ; radical leaves rosulate, variously 
shaped ; stem sometimes only 7 in. high and sparingly branched, 
sometimes 2 to 3 ft. high and very much branched ; flowers yellow, 
like lettuce. The whole plant is eaten by the negroes, and the leaves 
are prepared and eaten by the colonists after the fashion of lettuce. 
In places neglected after cultivation and at the sandy margins of 
dried-up streams, plentiful ; Quicuxe ; fl. and fr. 7 Feb. 1859, got in 
company with Governor Amaral. Colonial name “ Serralhas” (milk 
lettuce). No. 3629. An annual or biennial erect herb, simple or 
sparingly branched, milky, with the habit of this genus or of Sonchus ; 
stem smooth, glaucescent ; leaves variable, membranous, quickly 
withering ; ligules of the florets pale yellow, flesh-coloured-purplish 
outside. It is used like endive as a salad and Welwitsch pronounced 
it very relishing. In rather dry and in moist places among low bushes 
throughout the district, not uncommon ; between the two Maiangas ; 
fl. and fr. Feb. 1858. No, 3630. At Loanda ; fl. and fr. May 1854. 
No. 3631. 
CAPE DE VERDE IsLtAnps.—Along the rocks at the shore near Villa 
da Praya, in the island of San Thiago, tolerably plentiful, but mostly 
past flowering ; fl. and fr. Jan. 1861. Our specimens much resemble 
Lactuca nudicaulis Murr. in Nov. Comment. Gotting. iii. p. 74, t. 4 
(1773), but the achenes differ in having a very short beak. No. 3652. 
2. L. petrensis Hiern, sp. n. 
An erect subglaucescent perennial herb, 9 to 15 in. high or 
more; rootstock rather thickened and almost woody; stems 
sulcate-striate, glabrate or puberulous above with short simple 
hairs, leafy throughout ; leaves alternate, oval-oblong, acute at the 
apex, broad or somewhat narrowed at the sessile or subsessile clasp- 
ing base, thinly herbaceous, denticulate and sometimes with a few 
short spreading lateral lobes, scattered on both faces with minute 
glandular adpressed scales, hispid with rather long and fleshy 
simple hairs along the midrib, otherwise glabrous, 2 to 3 in. long 
by 4 to 1 in. broad; the teeth spreading, unequal, acute, often 
prickly ; capitula broadly campanulate, many-flowered, about 3 in. 
long or rather more, on rather substantial pedicels ranging up to 
2 in. long, arranged in flat-topped rather dense bracteate terminal 
somewhat leafy cymes 13 to 2 in. broad; bracts intermediate in 
form and size as well as position between the ordinary leaves and 
the involucral bracts, sessile, clasping ; involucral scales imbricate, 
pluriseriate, mostly subacute at the apex, not thickened at the 
base, the outermost ones broadly ovate often obtuse, the inner 
ones successively longer and more oblong, the innermost ones 
linear-lanceolate or sublinear subobtuse 3 in. long, all partly 
clothed with minute glandular adpressed scales on the back, thinly 
coriaceous with thinner coloured or scarious margins; flowers 
