86 CRUCIFER^. (mustard FAMILY.) 



* * * Silicles cowoex^ canescent ; cells 2-oDulecl. Filaments toothless. An7iuals. 



21. A. pauiaseenum, Boiss. et Gaill. .1, ashy, branching 

 from base. Lieaves all ohovate to obovate-oMong . Flowering racemes 

 dense ; petals bifid. Fruiting racemes .03 to ,03 long ; silicles scurfy, 

 orhimlai\ .002 long ; style as long as pod, or shorter ; seeds wingless 



— Spring — Fields ; Damascus. Qaldiin. Deir 'Atiyeh. 



22. A. calyciiium, L. .08 to .25, branching from base. 

 Lower-leaves obovate, iqyper ohlanceolate to oUong-linear, all silvery. 

 Flowering racemes dense ; fruiting loose .08 to .1 long ; se])als persis- 

 tent in fruit ; silicles orbicular, retuse, .003 \ong,tHth Jiattened margin; 

 style almost ; seeds narrowly margined — Spring — Jebel Qaisun, 

 Damascus. 



* * * * Silicles flattened., glah^ous ; cells d-Q-seeded. Filaments dentate. 

 Petals twice as long as calyx. Annuals. 



23. A. aureum, Fenzl. © .1, branching from base. Leaves 

 oblong-linear. Silicles elliptical .006 long, .003 broad ; style hcdf as 

 long as pod — Spring — Jerusalem to Hauran, Aleppo, and northward. 



24. A, meniocoicles, Boiss. As above, with linear-sul)ulate 

 leaves, and sliort style — Spring — Mountains near Damascus, Deir 

 'Atiyeh, and northward. Too near the last. 



33. DRABA, L. Whitlow-Grass. 



Calyx erect, equal at base. Petals entire or retuse. Filaments 

 toothless. Stigma capitate. Silicles lenticular or elliptical, flattened 

 or (in ours) turgid. Seeds in 2 rows, often numerous, not margined 



— Annual or (in ours) perennial, dwarf herbs, usually tufted, with 

 white or (in ours) yellow flowers, and undivided leaves. 



* Leaves pectinate-ciliate. Cells few-ovuled. 



1. D. Olyinpica, Sibth. 2f .1 ; tufts broad, dense. Leaves 

 narrowly linear, acute. Stamens scarcely longer than adyx. Silicles 

 small, turgid, elliptical, 5-6 times as long as style — Summer — Rocky 

 places in alpine regions. 



Var. lieterocoina, Boiss. All the leaves erect, or lower reflexed. 

 Scapes glabrous. Fruiting racemes often elongated. Pods hairy — 

 Amanus, and northward. 



2. I>. oxycarpa, Boiss. '^. .02 to .06 ; tufts small, dense. 

 Leaves oblong to linear, acute. Stamens iiea/rly as long as corolla. Fruit- 

 ing racemes und)el-like ; silicles scabrous with minute stellate hairs, 

 ovate-lenticular, long-acuminate.^ .007 long, exclusive of the .()^'^ filiform 

 style — May to August — Alpine regions of Lebanon and Hermon. 



* * Leaves villous. Cells lQ-24:-ovuled. 



3. D. vesicaria, Desv. If .01 to .05 ; tufts obconical, very 

 compact. Leaves densely imbricated, oblong, acutish, villous with 

 branching hairs intermixed with simple bristles. Sepals scabrous, 

 scarious-margined. Petals nearly twice as long as calyx. Stamens as 

 long as calyx. Silicles scabrous with short stellate hairs, elliptical, .005 



