276 CRUCIFERAE 
l. L. Draba, L. Hoary Cress. Plant 10 to 12 in. high, hairy, stem 
leaves arrow-formed, basal leaves elliptic. Seed pods oval or rounded, 
flat, without wing-like appendages but with a distinct style at summit. 
Fields, waste places; rare. Naturalized. May-July. 
2. L. campestre, (L.) R. Br. FIELD oR Crow Cress. Stem leaves 
similar to No. 1, basal rosette of pear-shaped leaves, rounded at apex. 
Pod without a style, but thin wing-like appendage at sides and especially 
at summit. Flowers and fruit pod crowded on fruit bearing stem. A 
weed in cultivated ground, naturalized. April-June. 
3. L. virginicum, L. (Fig. 1, pl. 54.) Wuitp Preprercrass. Stem 
leaves elliptic, deeply notched, basal rosette of pear-shaped leaves, rounded 
at apex, notched at borders, the leaf stalk feather-formed. Seed pod 
nearly round with a notch at the summit and a narrow wing-like ap- 
pendage on either side of it. A weed in cultivated fields and in waste 
places. May-Nov. 
4. L. sativum, L. GARDEN oR GOLDEN PEPPERGRASS, Stem about a 
foot high, smooth, bright green. Leaves, at least the lower, feather- 
formed, 3-parted, each division feather-formed. Upper leaves more or 
less linear with deep sinuses cutting into narrow lobes. Seed pod with 
narrow wing-like border. Waste places. Naturalized. May-Aug. 
5. L. apetalum, Willd. ApreraLrous Prprrrcrass. Basal rosette of 
featherformed leaves, upper nearly linear, more or less distantly notched. 
Flowers small, petals quite small or wanting. Pods round, notched at 
top with narrow wing-like border above. Naturalized. May-Aug. 
6. L. ruderale, L. Narrow-LEAvED PepprercRAss. Similar to last, 
but seed pod has no wing-like margin. 
2. CAPSELLA, Med. Pfl. Gatt. (Bursa, Weber) 
Stems spreading, one or more erect. Leaves mostly in a basal rosette, 
those of the upper part of stem narrow, clasping, more or less arrow- 
shaped. Those of the rosette lyrate, feather-formed, somewhat hairy. 
Pod triangular or pear-shaped, several seeds in each cell. 
C. Bursa-Pastoris, Med. Pfl. Gatt. (Fig. 6, pl. 54.) SHEPHERD’s 
PursE. Very common in waste places. 
3. THLASPI, L. 
Plant 4 to 14 ft. high. Lower leaves with leaf stalks, pear-shaped, 
upper stem leaves arrow-shaped without leaf-stalks, toothed or distantly 
dentate. Pod round or pear-shaped. 
T. arvense, L. Frerp Penny Cress. Pods nearly round, with a rather 
deep sinus at apex and with a broad margin of wing-like expansion. 
Flowers and pods crowded on a long slender stem. In waste places. June- 
Aug 
4. CORONOPUS, Gaertn. 
Diffuse, 3 to 15 in. high. Leaves crowded, feather-formed. Flowers 
in crowded clusters quite small. Stamens 2 to 4. Pods with the lateral 
diameter greater than the longitudinal. Valves of the pod rough, de- 
pressed at apen. 
