88 PORTULACACEAE (PURSLANE FAMILY) 



Style 3-cleft. Seeds not more than 6. (Honor of J. Clayton, an American 

 botanist.) 



A. Flowers yellow. E. C. aurea 



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; 

 corm globose. W. C. E. C. lanceolata (PIGEON-ROOT) 



CC. Stem 2-5 cm. high; stem leaves petioled, ovate to orbicular; corm oblong or 

 fusiform. E. C. umbellata 



BB. Stems and leaves from the top of a fleshy root; stem leaves usually alternate. 

 1-3. E. C. megarrhiza (PURPLE-ROOT) 



MONTIA (MINER'S LETTUCE) 



Annual or perennial, glabrous. Flowers pale or white, delicate, in racemes ; 

 racemes axillary or terminal, simple or compound, loose. Sepals 2-3. 

 Petals 0-5, 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. Seeds 3. (Honor of G. Monti, an Italian botanist.) 



A. Stem leaves opposite. 



B. Stem leaves i pair, often united into a disk. 

 C. Stem leaves not united. 



D. Plants with creeping rhizomes; most of the pedicels not subtended by bracts. 

 W. C. E. M. asarifolia 



DD. Plants without rhizomes; most of the pedicels subtended by bracts. 

 E. Basal leaves ovate. W. C. E. M. sibirica 



EE. Basal leaves narrower than ovate. 



F. Stem leaves all quite separate; inflorescence 12-50 mm. long; petals 6 mm. 



long. E. M. arenicola 



FF. Stem leaves somewhat united; inflorescence 6-12 mm. long; petals 2-4 mm. 



long. (See G.) 



CC. Stem leaves united at least at base. 



G. Stem leaves terete to ovate-lanceolate, not united into a disk but usually 

 somewhat united at base at one or both sides. W. E. M. spathulata 



GG. Stem leaves wide, united into a disk which may however be lobed. 

 H. 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. 



M. perfoliata 



HH. Calyx 2 mm. long; seed i mm. wide; pedicels in fruit 2-6 times as long as 

 the calyx; basal leaves various. W. C. E. M. parviflora 



BB. Stem leaves several pairs, not united. 



I. Plant perennial, with filiform runners; petals 6 mm. long, pale rose color; leaves 



25-50 mm. long including the petiole. W. E. M. chamissonis (TOAD-LILY) 



n. Plant annual, without runners; petals 2 mm. long, white; leaves 1.5-13 mm. 



long including the petiole. W. E. M. fontana (BLINKS) 



AA. Stem leaves alternate. 



J. Annual, without stolons; leaves not very fleshy; petals 5 mm. long or shorter; 



sepals 4 mm. long or shorter, a little shorter than the petals. 

 K. Leaves narrow, sessile, clasping at base; stamens 2-5; seed quite smooth. 

 L. Leaves linear, 12-75 mm. long; petals 5. 



M. Leaves 2.5-7.5 cm. long; racemes dense; sepals about 4 mm. long; petals 

 4-5 mm. long; seed about 2 mm. wide. W. E. M. linearis 



