FLORA OF ADEN. 
m 
margins ; innermost bracts subequal ; the outer gradually shorter, the 
outermost often very short. Receptacle flat, naked. Corollas ligulate, 
truncate and 5-toothed at the apex. Anther-bases sagittate, with acute 
or shortly setaceo-acuminate auricles. Style-arms slender. Pappus 
copious ; hairs oo -seriate, simple, very slender, white, a few inner some- 
times longer and stronger, all connate at the base into a deciduous ring*. 
Achenes narrow, usually columnar, not contracted at the base or 
apex, truncate at both ends, sometimes winged, 4 — 5-ribbed. 
Species about 20. 
Distribution : — Mediterranean region of Europe, Canary Islands. 
Africa, East Indies. 
Heads in a lax corymbosely paniculate cyme . . 1. L. l'actucoides. 
Heads subracemose along the branches ... 2. L. nudicaulis. 
1. LaiilldBa lactucoides (Fresen) O. Hoffm. in Engl.-Prantl. NatiirL 
Pflanzenfam. IV, 5. 370. 
Heterachsenia massaviensis Fresen in Mus. Senckenb. Ill, 74; Oliv. 
FI. trop. Afr. Ill, 455. 
Brachyramphus lactucoides Anders. Journ. Linn. Soc. Y, Suppl. p. 23. 
Lactuca massaviensis Schultz-Bip. in Herb. Schimp. Abyss. II, n. 1045. 
Ill, n. 1462. 
Sonchus massaviensis Schultz-Bip. in Schweinf. Beitr. FI. Aethiop. 
p. 160. 
Zollikoferia massaviensis Boiss. FI. Or. ill, 825. 
Description : — An annual, glabrous, delicately dichotomously 
branched herb, 1-2 feet high. Branches terete, glaucescent. Leaves 
alternate ; stem-leaves runcinate, more or less deeply pinnatifid or un- 
divided, cordate, auriculate-amplexicaul, sessile, denticulate, 1 £ — 4J inches 
long ; radical leaves petiolate. 
Flowers blue. Capitula homogamous, ligulate, narrowly oblong, 
i inch long, 9 — 10-flowered, on slender pedicels of J — 1 inch, in a lax 
corymbosely paniculate cyme. Involucre cylindrical, at length thickened 
at the base; inner involucral bracts 5, narrow, lanceolate, obtuse, equal, 
membranous ; the outer ones few, small. Receptacle flat, naked. Ligule 
truncate, 5-toothed. Anthers sagittate at the base; auricles acute or 
shortly setaceous-acuminate. Style-arms slender. 
Achenes ^ i inch long ; outer ones narrow, dorsally compressed, 
cc -costate, transversely rugulose, attenuate at the base, contracted at the 
apex into a very short beak ; the inner ones narrow, subterete, 4 — 5-costate, 
smooth. Pappus copiously setaceous, smooth, persistent or deciduous in 
one piece. 
