CRUCIFEB&. 



237 



cylindrical; stigmatiferous apex cleft or 2-lobed; valves flat or con- 

 vex, sometimes torulose, 1-3-ribbed ; septum membranous or spongy. 

 Seeds oc, 1 -seriate oblong, glabrous or with very thin wrinkles, not 

 marginate; embryo sometimes herbaceous; cotyledons incumbent 

 sometimes concave, subconduplicate. — Annual or 2-ennial herbs, 

 glabrous, often glaucous ; leaves simple entire ; cauline oblong 

 auricled-amplexicaul ; flowers 1 racemose ebracteate ( West Asia, South 

 Europe*). 



23. Erysimum L. 3 — Flowers of CJieiranthus ; siliqua elongated, 

 subterete, or sub-4-gonous, rather compressed ; style short or more or 

 less elongated ; apex stigmatose capitate, emarginate or 2-lobed ; 

 valves usually carinate, 1 -ribbed; septum more or less membranous ; 

 style short or elongated, apex stigmatose capitate, emarginate 

 or 2-lobed. Seeds co , 1-seriate oblong, immarginate or at apex 

 marginate or apiculate ; funicles thin free ; embryo fleshy 

 cotyledons accumbent. — Biennial or perennial herbs, often hoary 

 with appressed (2-partite) hairs, sometimes laxly pilose or hairy- 

 tomentose ; leaves alternate narrow, 4 linear or oblong, entire sinuate 

 dentate or rarely pinnatifid ; flowers 5 in usually elongated ebracteate 

 racemes 6 (Mountains of South Europe, the East, Central Asia, North 

 America'). 



24 ? Porphyrocodon Hook, f. 8 — Sepals erect unequal; 2 a little 



1 Yellow or golden. 



2 Spec. 6. DC, Prodr., i. 199 (Erysimum).— 

 Boiss., Fl. Or., i. 209. — Walp., Rep., i. 169 ; 

 Ann., vii. 138. 



3 L., Gen., n. 814 (nee T.). — Adans., Fam. 

 des Fl., ii. 418.— J., Gen., 239.— DC, Prodr., i. 

 169.— Endl., Gen., n. 4908.— A. Geat, Gen. 

 III., t. 6.— B. H., Gen., 79, n. 54. 



4 Neither cordate-arnplexicaul nor pinnatisect. 

 s Rather large, golden, or rarely purple, often 



scented. 



6 The genus is scarce to be distinguished from 

 Sisymbrium by certain characters. Alliaria comes 

 between them. It is also closely allied to Cheir- 

 anthus (sect. Cheiri), differing mainly in its 

 usually accumbent cotyledons. According to 

 B. H. (loc. cit.), " The following sections are 

 made by modern botanists, but appear to be very 

 uncertain : 1. Agonolobus (C A. Mey.). Siliqua 

 subterete; valves and replum rounded at the 



back. (Reichb., Ic. Fl. 



Germ., ii. t. 



68).— 2. 



Cuspidaria (DC). Siliqua double; valves cari- 

 nate-compressed. — 3. Cheiropsis (C A. Mey.). 

 Siliqua compressed-4-gonous ; valves and replum 

 acutely carinate. (Reichb., loc. cit., t. 63). — 4. 

 Frysimastrum (C A. Mey.). Siliqua 4-gonous ; 

 valves and replum subprominent carinate. 

 (Reichb., loc. cit., t. 63. — Deless., Ic. Sel., ii. 

 t. 66, 67.)" To this genus the same authors refer 

 Strophades (Boiss., in Ann, Sc Nat., sew 2, xvii. 

 73. — Walp., Rep., i. 171), a rigid silvery Meso- 

 potamian herb, with narrow linear leaves, much 

 elongated fruiting racemes, purple petals, a dis- 

 tinct rigid subulate style, a terete twisted siliqua 

 laterally compressed. 



7 Species made by authors upwards of 100, 

 but should, perhaps, be reduced to 15-20. Deless., 

 Ic. Sel., ii. t. 65-67.— Boiss., Fl. Or., i. 186.— 

 Eichl., in Mart. Fl. Bras., Crucif., 304. — Gren. 

 & Godr., Fl. de Fr., i. 87. — Walp., Rep., i. 167; 

 ii. 761; Ann., i. 42; ii. 48; iv. 210; vii. 139. 



8 Gen., 79, n. 52. 



