150 Portulacaceae 
cleft. Capsule 3-valved from the top. Seeds not more than 6, compressed, orbicular 
or reniform, smooth, shining. (Honor of J. Clayton, an American botanist. ) 
A. Flowers yellow. E. C. aurea Nels. 
AA. Flowers white or pink, with pink or purple veins. 
B. Stems and leaves from a deep-seated corm; stem-leaves opposite, 2. 
-C. Stem 7.5—15 cm. high; stem-leaves sessile, narrowly lanceolate to oblong; 
sorm globose. W. C. E. 
C. lanceolata Pursh (Pigeon-root) 
CC. Stem 2—5 cm. high; stem-leaves petioled, ovate to orbicular; corm oblong 
or fusiform. E. C. umbellata Wats. 
BB. Stems and leaves from the top of a fleshy root; stem-leaves usually alternate, 
|=) CES C. megarrhiza Par. (Purple-root) 
MONTIA MINERS’ LETTUCE 
Annual or perennial, glabrous, juicy. Flowers pale or white, delicate, in racemes; 
racemes axillary or terminal, simple or compound, loose. Sepals 2—3, persistent. Petals 
O—5, more or less united at base, usually unequal, 3 a little smaller than the other 2; 
stamens 3—5, on the very base of the corolla, opposite the petals. Capsule 3-valved. 
Seeds 3. (Honor of G. Monti, an Italian botanist.) 
A. Stem-leaves opposite. 
B. Stem-leaves | pair, often united into a disk. 
C. Stem-leaves not united. 
D._ Plants with creeping rhizomes; most of the pedicels not t subtended by bracts. 
W.C. E. (Claytonia asarifolia.) 
M. asarifolia How. 
DD. Plants without rhizomes; most of the pedicels subtended by bracts. 
E. Basal leaves ovate. 
F. Root-crown without bulblet-scales; sepals ovate. W. C. E. (Clay- 
- tonia sibirica.) M. sibirica How. (Common Miners’ Lettuce) 
FF. Bases of radical leaves persisting on root-crown as bulblet-scales; se- 
pals cordate. W. (M. bulbifera.) 
M. sibirica bulbifera Rob. 
EE. Basal leaves narrower than ovate. 
G. Stem-leaves all quite separate; inflorescence |2—50 mm. long; petals 
6 mm. long. E. (Clavtonia arenicola.) 
M, arenicola Hel. 
GG. Stem-leaves somewhat united; inflorescence 6—12 mm. long; petals 
2—4 mm. long. (See H.) 
CC. Stem-leaves united at least at base. 
H. Stem-leaves terete to ovate-lanceolate, not united into a disk but usually 
somewhat united at base at one or both sides. 
I. Petals white; stem-leaves lanceolate to ovate-lanceolate, distinctly dilated. 
W. E. (Claytonia spathulata.) 
M. spathulata How. 
II. Petals usually rose-colored; stem-leaves terete to narrowly oblong, very 
little if any dilated. W. (Claytonia spathulata exigua; M. tenuifolia.) 
M. spathulata exigua Rob. 
HH.  Stem-leaves wide, united into a disk which may however be lobed. 
J. Calyx 4 mm. long; seed 2 mm. wide; pedicels in fruit rarely longer than 
the calyx; basal leaves from spatulate-obovate to reniform. W. C. E. 

a, ee 
