Fig. 35. 



Fruiting raceme of 

 Biscutella Columnae. 



CRUCIFER^. (mustard FAMILY.) 93 



42. HEI.DIIEICHIA, Boiss. 



Calyx equal at base. Petals entire, 

 ■ Loni>-er filaDients winged ; wing tapering 

 or ending in a lateral tooth. Silicles flat- 

 tened, almost twin, obovate to transversely 

 ovate, truncate at apex, two-celled, dehiB- 

 cent. Valves helmet- shaped, keeled, wing- 

 less ; cells 1-ovuled ; seed flattened, not 

 margined. — Perennial, glabrous herbs, with 

 white flowers. 



H. towplevrifolia, Boiss. If .1 to .3 ; 

 root-stock slender, creeping, branching at 

 apex ; stems divaricately branching from 

 base. Leaves fleshy, obovate to spathulate, 

 petioled, entire, the uppermost linear, 

 obtuse. Silicles transversely ovate^ .004 long, 

 .008 broad, rounded at base, truncate at 

 apex, with short, apiculate style — Sept. — 

 Dhohr-el-Qodhib. 



Var. siil>tril®l>a, Boiss. Pod somewhat trilobed, by enlarge 

 ment at base of style — Top of Lebanon. 



43. THLASPI, L. Penny-Cress. 

 Calyx equal at base. Petals equal, or in unequal pairs, entire. 

 Stamens free, toothless. Silicles flattened, obcordate-orbicular, oblong 

 or obtriangular, generally notched at apex. Valves boat-shaped, 

 ovate.— Annual, biennial, or perennial herbs, with auricled, clasp- 

 ing leaves, and white or pink flowers. 



* Wing of silicles surrounded l)y a prominent nerve. 

 t Pods orbicular ; sinus narrow^ slit-like. 



1. Til. ferevicaiile, Boiss. et Ky. © .03 to .05. Root-leaves 

 small, petioled, ovate ; stem-leaves nearly entire, ovate ; auricles acute. 

 Petals white, retuse, once-and-a-half as long as calyx. Fruiting racemes 

 capitate; silicles .008 long, with reticulated wings ; Uig ma sessile ; 

 cells 4-6-seeded— May — Subalpine regions of Lebanon and An tilebanon! 



\\ Pods olcordate, with broad sinus ; cells ^-ovuled. Low herbs. 



2. Til. microstylum, Boiss. 0or @ .08 to .1 ; stems many, 

 ascending, short. Root-leaves petiolate, ovate ; stem-leaves clasping 

 with acutish auricles. Petals pale flesh-colored, twice as long as calyx ; 

 silicles oblong -subcor date, .008 long, with somewhat narrow sinus ; wings 

 nerved at apex, broader than cell ; style one-fourtli as long as sinus ; — 

 May — Alpine and subalpine zone of Lebanon and middle zone of 

 CassiuB. 



3. Til. perfoliatum, L. © Shemr-Murah .1 to .3, branching 

 from base, stems ascending, or erect. Root-leaves ovate-cordate, 

 ovate, obovate or elliptical, petiolate ; stem-leaves sometimes petio- 

 led, usually oblong-lanceolate, clasping, with rather obtuse auricles. 

 Petals, white, usually irregular, about twice as long as calyx ; silicles 

 obovate-orbicular, .008 long; stigma sessile — March to May — 

 Fields ; common everywhere. 



