CRUCiFER^. (mustard famelt.) 97 



51. ISATIS, L. WoAD. 



Sepals spreading, equal at base. Petals equal, entire. Filament* 

 free, toothless. Silicle indehiscent, linear or ovate, with elongated, fun- 

 gous (rarely membranous) cell ; back flat, or surrounded by an obtuse 

 margin, or winged only at apex ; wing fungous or membranous ; 

 stigma sessile ; seed 1, pendulous — Monocarpic or perennial herbs, 

 vrith yellow flowers, petioled lower and sagittate upper leaves, and 

 deflexed fruiting pedicels often thickened at apex. 



* Cell of pod fungous, surrounded ly a membranous wing. Perennials. 



1. I. latisiliqua, Stev. If. Tall. Lower leaves oblong-spathu- 

 late, upper linear-lanceolate. Silicles glabrous or pubescent, varying 

 greatly in size, ovate-orUcular or oblong icith rounded dase, or cuneate with 

 obtuse or tapering apex ; wing Iroader tJmn cell — Summer — Alpine 

 regions of Lebanon and Antilebanon: 



* * CelU of silicles ollong or linear, fungous, surrounded 

 ly a tliicTc fungous icing. 



t Perennials. 



2. I. glauca, Auch. If .6 to 1.3. glahrous, glaucous; stem 

 expanding into a Iroad j)anicle. Leaves entire ; lowermost with petioles 

 sometimes . 3 long ; upper minute, scarcely auricled. Silicles tomentellous, 

 linear-oblong from a cuneate base, .013 long, .005 to .006 broad, 

 obtuse or truncate-retuse — May and June — Fields ; Qaldun, north of 

 Damascus, and northward and eastward. 



3. I. Auclieri, Boiss 2f. .3 to .3, more or less woolly or 

 pubescent, many-stemmed, with small, few-branched panicle. Leaves 

 entire or repand ; lowermost oblong-spathulate, including petiole .05 

 long ; upper linear-lanceolate acutely long -auricled. Silicles tomentose, 

 oblong, .015 long, .006 broad, truncate-retuse at apex ; wing narrow, 

 dilated above cell — May and June — Mountains about Behesne and 

 northward and eastward. 



Var. Tellerifera, Boiss. Wool of silicles long, villous, com- 

 pletely hiding the cell — Marash. 



4. I, hispida, If .2 to .3 hispid, woody at base ; panicle 

 small, loose. Leaves mostly on lower sterile stems, entire or repand, 

 obovate, tapering at base into a petiole, .1 to .12 long, .015 to .025 

 broad, obtuse, upper feic, small, not auricled. Silicles (immature) pan- 

 nous, obovate, somewhat dilated and truncate-retuse at apex ; wing 

 narrow, hardly expanded above cell — Summer — Subalpine regions of 

 Akherdagh. Further study, with ripe fruits, is required to determine 

 whether this species may not be a variety of the last. 



5. I. cochlearis, Boiss. 2f ? .6, glabrous, except along ribs 

 of leaves. Leaves oblong-lanceolate, acutely dentate, those of stem 

 lanceolate, auricled. Silicles .008 long, woolly, oblong-cuneate, scarcely 

 winged above, cell glabrescent, somewhat concave — Summer — Moun- 

 tains about Behesne. 



16 



