63 
a. Stamens of the same number as the sepals. 
earlwort. (Sagina procumbens.) 
b. Stamens twice as many as the ѕераів.............................. 74 
а. Leaves about } in. long, awl-shaped to ovate....................... 275 
BERN ҮЧ or more Tong... oce Vi sesso ath dee 276. 
a. Leaves ovate; flowers about 1 in. broad. 
Thyme-leaved Sandwort. (Arenaria serpyllifolia.) 
b. Leaves awl-shaped; flowers about 2 in. broad. 
Pine-barren Sandwort. (Arenaria caroliniana.) 
а. Leaves 1—4 in. is. all basal; — common. 
age. (Saxifraga virginiensis.) 
b. Leaves j-1 in. long, oval to OT .Sandwort. (Moehringia lateriflora 
а. Flowers white; perianth not diterentinted: leaves 2 or 
False Lily-of-the-Valley. ( Unifolium canadense.) 
5 Phat nct compter 38 DUE. Lui yt ON с л. 278. 
а. Petals 4; = 4; stamens ie ie и: Dau cubre dt REMANET TUA 27 
б, РЕБЕ OF DRE ы дды ди nck owns н a ee a с 287 
а. Pods or ovaries зони less than twice as long as broad............... 
b. Pods or ovaries elongated, usually more than twice as long as broad... 281. 
a. Flowers purple, about $ in. broad......... Honesty. (Lunaria es 
b. Flowers white, + in. or less broad... Horse-radish. (Roripa Armoracia.) 
a. Flowers {—т in. broad, purple or white, fragrant. 
Dame's ued ( Hesperis исе “4 
b) Plowete © in. oF jas brood к oo a Fe eiui esu. iE 
a. Basal leaves usually rounded....... Bulbous Cress. (Cardamine a Ч 
b: Basal leaves nob rounded. а е tk Ar 283. 
a. Plant usually 1 ft. or more high; stem leaves ie ке ену ee ee 284. 
b. Plant 1 ft. or less high; stem leaves usually wanting................. 286. 
а. Stem leaves not with clasping bases.. Гнат; (Arabis T 
b. Stem leaves with ¢laening Dasen.. oos o eea a we 
a. Basal leaves 1—2 in. long; pods erect.. Hairy Rock-cress. (Arabis саи ) 
b. Basal leaves 2—4 in. long; pods recurved. 
Smooth Rock-cress. (Arabis laevigata.) 
a. Basal leaves 1—2 in. long... Mouse-ear Cress. (Stenophragma Thaliana.) 
b. Basal leaves 1 in. or less long............. itlow-grass. raba verna.) 
а. Leaves thick and fleshy............. Wild Stonecrop. (Sedum ternatum.) 
b Leare potas na ensi AVI D LL E M CL ee 288. 
5. Leaves round-heatt-shaped. ..... оаа ш. eI EA Ce SL VE 289. 
o Leaves obavate LO: OVAL io cid esee e licut RN iode dr ER Гул. 290. 
a. Plant prostrate; flowers 1—1 in. broad. 
Common Mallow. (Malva rotundifolia.) 
b. Plant erect; flowers 1-2 in. broad....High Mallow. (Malva sylvestris.) 
в. Leaves ан: Һһаза]............... Early Saxifrage. (Saxifraga virginiensis.) 
б Leaves not all basal... V. oc sick Pimpernel. м floribundus.) 
а. Ovary inferior; flowers in umbels; petals 5; stamen 292 
b. Ovary superior; flowers not completely as in a.... 296. 
а. Leaves 3; leaflets 3-5; flowers white, at summit of siut: 
Ground-nut. (Panax зди, 
b. Plants not pletely as in a 
