Centaurea. - 1033 
I. Heads without an outer inyolucre of leaves 
(Cyanis)<-53 ci.) os» A dais eth eee! 3) DoCS PRB SEe 
Il. Heads with an is involuere of leaves 
(MelGnOLOMA) ~ oo. 665 3 nig EAs ety ef yay Gs Ce pullatas 
D. Seales of the involuecre membranously-margined, 
with pinnate-spinous appendages. 
I. Pappus equal, persistent (Phaeopappus). . . 7. C. scoparia. 
IJ. Pappus unequal, double, sometimes deciduous. 
a) Side-cilies or-spines pinnately disposed. 
1. Terminal-spine not indurated (Acro- 
CORTON) te. hire ete Sta ky sat heen ee 8. C. eryngioides. 
2. Terminal-spine indurated. 
a) Terminal-spine only at the base with 
some very short side-spines, leaves 
decurrent (Calcitrapa). 
4 OWETS “PULMICWe <n 3 oe, eee, 9. C. Calcitrapa. 
EP lOWeteApINK one megs 24s 2 «  ,l0. (. toreuracen: 
*<* Flowers yellow. 
+ Upper leaves auricled . . . 11. C.alexandrina. 
+++ Upper leaves not auricled . 12. C. paltescens. 
8) Terminal-spine all over beset with 
side-spines, only the upper leaves 
decurrent (Mesocentron). 
* Flowers yellow ...... . -. 13. C. solstitialis. 
** Flowers pale-purple ..... . 14. C. aegyptiaca. 
b) Side-spines palmately disposed. 
1. Annual herbs (Seridioides) ... . . 15. C. glomerata. 
2, Perennial herbs (Seridia) . . . .. . 16. C. dimorpha. 
1436. (1.) Centaurea Lippii L. Spec. Plant. I (1753), p. 1286. 
— Schh. Handb., tab. 261. — Amberboa Lippii DC. Prodrom. VI, 
p- 559 not of Willk. and Lange. — Aschers.-Schweinf. Ill. Flor. d’Eg., 
p-95 no.605. — Boiss. Flor. Or. II, p. 606. — Aschers. Flor. Rhino- 
col, p.799 no. 158. — Sickenberg. Contrib. Flor. d’Eg., p. 248. — 
Volutarella Lippii Cass. ap. Benth. and Hook. Gen. Plant. II, p. 476. 
— An annual plant, 15—25 cm high or sometimes somewhat more, 
papillose; stems slender, erect or diffusse, stiff. Lower leaves petioled, 
lyrate or pinnatisect into ovate or oblong, dentate lobes; upper 
leaves sessile, pinnatipartite into linear lobes. Heads ovate, 8 mm 
long, long-peduncled; involucre villous, scales tapering into a lanceo- 
late, scarious, erect tip; flowers all pink. — Flow. February to May. 
D. 1. Siut. — D. i. Wady-el-“Arish. — D. a. sept. D. a. mer. 
Common in the Wadies on calearious ground. . 
