PURSLANE FAMILY 49 



(1) Petals 2; stamen 1 CALYPTRIDIUM 



(2) Petals 4; stamens 3 SPRAGUEA 

 c. Stigmas 4-6; flowers yellow PORTULACA 



2. Sepals 4-8 LEWISIA 



CALYPTRIDIUM Nuttall 1838 

 (Gr. kalyptra, cap, -idium, little) 



Sepals 2, usually persistent, petals 2, rose, minute, stamens 1, ovary 

 1-celled, stigmas 2, capsule 2-valved; flowers in axillary or terminal spikes; 

 leaves alternate ; annual. 

 Stems weak, 2-5 in. long; leaves oblong-spatulate C.roseiim 



CLAYTONIA Linne 1753 SPRING BEAUTY 



(Named for Clayton, an American botanist) 



PL 9, fig. 11-12. 



Sepals 2, persistent, petals 5, white, rose or yellow, stamens 5, on the 

 petal bases, ovary 1-celled, stigmas 3, capsule 3-valved; flowers in terminal 

 clusters ; leaves opposite or alternate ; annual or perennial. 



1. Basal leaves spatulate in a dense rosette, from a 



fleshy tap root ; at 10-14000 ft. C. megarrhiza 



2. Basal leaves few, single or none, linear to lance- 



oblong ; at 5-9000 ft. 



a. Stems from a bulb-like corm C. lanceoldta 



b. Stems not arising from a corm, often with 



runners or rooting at the joints C. Chamissoi 



LEWISIA Pursh 1814 BITTER-ROOT 

 (Named for Lewis, of the Lewis and Clarke expedition) 



Sepals 4-8, unequal, persistent, petals 8-16, rose to white, stamens 

 many, ovary 1-celled, style deeply 3-8-cleft, capsule splitting circularly; 

 flowers single ; leaves in a dense rosette ; perennial. 



Stemless ; leaves linear to spatulate, 1-3 cm. long ; $ 



flowers 1-2 in. wide L. rediiiva 



OREOBROMA Ho well 1893 OREOBROMA 



(Gr. oreos, mountain, broma, food) 



PL 9, fig. 13. 



Sepals 2, persistent, petals 5-10, red, pink or white, stamens more than 

 5, ovary 1-celled, style 3-7-cleft, capsule opening circularly; flowers soli- 

 tary or few in a cluster ; leaves linear to spatulate ; perennial. 



