72 VIII. CRUCIFER^ (OLIVER). [Enartkrocarpus. 



incumbent and the cotyledons in the seeds of the lower article conduplicate 

 or folded. — Erect, scabrid or more or less hispid annual herbs. Leaves, ra- 

 dical lyrate, cauline toothed. Racemes elongate, more or less bracteate. 

 Flowers yellowish or purple. 



A ^raall genus of the eastern Mediterranean region. 



Siliqua not winged, distinctly longitudinally striate 1. ^. lyrattis. 



Siliqua winged below, acuminate, transversely barred 2,. E. pterocarpus. 



1. C lyratus, DC. Syst. Veg. ii. 661.' An erect or ascending, more or 

 less branched herb, more or less pilose-hirsute below. Radical leaves lyrate- 

 pinnatifid, lobes spreading, toothed ; cauline lyrately- or pinnately-toothed, 

 more or less hirsute or sparsely pilose. Racemes terminal, elongate, bracteate. 

 Bracts oblong or oblanceolate, toothed or the lower lyrate. Pedicels erect, 

 1-2 lines. Flowers " yellowish, streaked with purple." Siliquas erect or 

 curved, more or less nodulose, longitudinally striate, glabrate scabrid or 

 pilose, obtusely acuminate with the persistent style. 



Nile liand. Dongola, Ehrenberg. 

 Au Egyptian plant. 



2. E. jpterocarpus, DC. Syst. Veg. ii. 661. Much branched from the 

 base, hispid-scabrid below. Leaves petiolate, lyrate-pinnatifid with dentate 

 segments ; upper oblong, dentate or serrate. Pedicels erect, usually brac- 

 teate. Siliquas erect, linear-acuminate arcuate, with winged setulose-scabrid 

 margins; valves transversely constricted. — Deless. Ic. Sel. ii. 93. 



Nile Ijand. Nubia {Schweinf. et Asch. Enum.). 

 Also in Egypt. 



20. ZILLA, Forsk. ; Benth. et Hook. f. Gen. PI. i. 98. 



Sepals erect. Petals clawed. Silicule bony or crustaceous, ovoid or pyra- 

 midal, beaked, winged or unappendaged. Seeds solitary. Cotyledons con- 

 duplicate. — Shrubby, much-branched, often spinescent herbs. Leaves oblong 

 or linear, entire or toothed, rather fleshy. Flowers white or violet, solitary 

 or racemose. 



A small desert genus of northern Africa and western Asia. 



1. Z. myagroides, Forsk. ; DC. Syst. Veg. ii. 646. Glaucous more 

 or less. Branches rigid, terete, intricate, usually terminating in acute divari- 

 cate spines. Flowers scattered on the extremities or subracemose. Silicule 

 shortly pedicellate, ovoid or ovoid-globose with a conical-subulate beak, 

 nearly smooth or reticulate-rugose. 



Var. microcarpa {Z. microcarpa. Vis. ; Schweinf. PI. Nilot. t. 7). 

 Nile Iiand. Nubia {Schweinf. et Asch. Ermm.). 

 A desert plant of North Africa and Arabia. 



21. DIPTERYGIUM, Dene. ; Benth. et Hook. f. Gen. PI. i. 95. 



Sepals short. Silicules ellipsoidal, slightly compressed laterally, indehis- 

 ceut, girt with a membranous wing, 1-celled, 1-seeded. Seed not margined ; 

 cotyledons concave; radicle incumbent. — A shrubby herb, with numerous, 



