CRUCIFERAE (MUSTARD FAMILY) 



425 



tate-clasping ; broadly winged pod 1.2 cm. in diameter, deeply notched at 

 top ; style minute. Waste places ; not common, except along our northern 

 borders, where too abundant and called " FRENCHWEED." (Nat. from EU.) 

 FIG. 741. 



2. T. PERFOLIATUM L. Leaves sessile, the upper subperfoliate ; pod 

 smaller (5mm. broad). Reported as occurring near Hamilton, Ont. (Adv. 

 from Eu.) 



7. LEPIDIUM [Tourn.] L. PEPPERWORT. PEPPERGRASS 



Pod roundish, much flattened contrary to the narrow partition ; valves boat- 

 shaped. Seeds solitary in each cell, pendulous. Cotyledons incumbent, or in 

 no. 1 accumbent ! Flowers small, white or greenish. (Name from \eirldtov, a 

 little scale, alluding to the fruit.) Ours are annuals or biennials, except the 

 last. 



* Leaves all with a tapering base, the upper linear or lanceolate and entire, the 

 lower and often the middle ones incised or pinnatifld. 



t~ Stamens 2 ; pods orbicular or oval, slightly notched at top ; style minute or 

 none ; fruiting pedicels slender, widely spreading ; plant green. 



1. L. virginicum L. 



(WILD PEPPERGRASS.) Cotyledons accumbent and 

 seed minutely margined; pod marginless or 

 obscurely margined at the top ; petals present, 

 except in some of the later 

 flowers. A common weed 

 of roadsides and waste 

 places. June-Sept. FIG. 

 742. 



2. L. APETALUM Willd. 

 Nearly scentless ; leaves 

 toothed or pinnatifid ; coty- 

 ledons incumbent as in the 

 following; pod orbicular, 

 minutely wing-margined at 

 the top ; petals usually want- 

 ing. (L. intermedium Man. 743. L. apetalum. 

 ed. 6.) Dry places, espe- Leaf and tip of raceme 

 cially roadsides, by rail- x 2 / s . 

 roads, etc., perhaps native Pod x 2%. 

 in the West, recently introd. Cross-section of seed 

 eastw. (Eurasia.) FIG. x4 - 

 743. 



3. L. RUDER\LE L. Very fetid; lower leaves 

 bipinnatifid ; the smaller and oval pods and seeds 

 marginless ; petals none. Roadsides and waste 

 places, chiefly near Atlantic ports. (Nat. from Eu.) 

 FIG. 744. 



H- H- Stamens 6; pods ovate, winged; 

 style more evident in deeper notch / 

 pedicels thickish, compressed, as- 

 cending / plant very glaucous. 



4. L. SAxlvuM L. (GARDEN CRESS.) 



Glabrous annual (3 dm. high) ; lower ^45 L sativum 

 leaves bipinnatifid ; racemes long and 

 stiff ; petals present. Common salad 



plant, tending to escape from cultivation. (Introd. from Eu.) 



FIG. 745. 



c. a. 



742. L. virginicum. 



a. Leaves and tip of raceme x 2 / 3 . 



b. Septum, pod, and petal x 2%. 



c. Cross-section of seed x 4. 



744. L. ruderale. 



Leaf and tip of raceme x V 3 - 

 Pod x 2y 3 . 

 Cross-section of seed x 4. 



