CRUCIFERAE (MUSTARD FAMILY) 426 



'^te-dasping ; broadly winged pod 1.2 cm. in diameter, deeply notched at 

 .op ; style minute. — Waste places ; not common, except alon*' our northern 

 borders, where too abundant and called " Frenchweed." (Nat. from Ku.) 



"^-'^'/^^^^Y^'^^.^ ^ Leaves sessile, the upper subperfoUate : pod 

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

 from Eu.) ^ 



7. LEPIDIUM [Toum.] 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 Xe7r/5to^ a 

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

 last. 



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

 lower and often the middle ones incised or pinnatifid. 



4- 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 j 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 

 tootlied 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 «/»• 

 roads, etc., perhaps native P<><1 x •.'%. 

 in the West, recently introd. Cross-st-ction of seed 

 eastw. (Eurasia.) Fig. ^^^ 

 743. 



3. L. ruderIle 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 Ku.) 

 Fig. 744. 



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

 style more evident in deeper notch; 

 pedicels thickish, compressed, as- 

 cending ; plant very glaucous. 



4. L. SATIVUM L. (Garden Cress.) 

 Glabrous annual (8 dm. high) ; lower 

 leaves bipinnatifid ; racemes long and 

 stiff ; petals present. — Common salad 



plant, tending to escape from cultivation. (iDtrod, from En.) 

 Fig. 745. 



c. a. 



742. L. virginicum. 



a. Leaves and tip of raceme x 2/3 



b. Septum, pod, and petal x 214. 

 0. Cross-section of seed x 4. 



744. L. mderale. 

 Leaf and tip of raceme x •/»• 

 Pod X 21/3. 

 Cro,5S-8ection of seed X 4. 



T46. L. sativum 

 Part of fruitlnjf 



