PLATANACEAE 103 



1. SEDUM L. 



Succulent herbs with cyinose flowers. Sepalsand petals 4-5. Stamens 

 8-10. 



1. S. pulchellum Michx. Widow's Cross. 2^-12^ high, ascending : 

 leaves numerous, linear-terete, sessile and clasping : cymes 4-7, forked, 

 bearing the numerous flowers on the upper side : petals pinkish. — Abun- 

 dant throughout on limestone rocks. May-June. 



2. PENTHORUM L. 



Erect herbs with alternate leaves and cymose flowers. Sepals 5. Petals 

 or 5. Stamens 10. Pistils 5, united at base, each beaked at the 

 summit. 



1. P. sedoides L. Ditch Stone Crop. 1 °-3° high : leaves oblong- 

 lanceolate, serrate, short-petioled : flowers yellowish-green. — Frequent 

 throughout along streams and in wet places. July-September. 



Family 55. SAXIFRAGACEAE Dumort. 

 Herbs with perfect flowers, 5-lobed or parted calyx, 4-5 petals, usually 

 4-5 or 8-10 stamens, and superior ovary consisting of 1-several carpels, 

 usually fewer than the sepals. Seeds numerous with copious endosperm. 



1. HEUCHERA L. 



Herbs with long-petioled orbicular basal leaves and terminal panicles 

 of small flowers. Calyx bell shaped. Petals 5. small. Stamens 5. 

 Ovary 1-celled. Styles two. 



1. H. Americaxia L. Alum Root. 2°-3° high, glandular-hirsute: 

 leaves cuneate-dentate : calyx \\"-Z'' long. — One plant in a wood several 

 miles north of Lake City (B. F. Bush); also at Merriam Park, Kansas 

 (Eev. Cameron Mann). May-June. 



Family 56. GROSSULARIACEAE Dumort. 

 Shrubs with alternate leaves and axillary flowers. Flowers perfect. 

 Calyx adnate to ovary, its limb 4-5-cleft. Petals and stamens each 4-5, 

 inserted on calyx throat. Ovary 1-celled with two parietal placentae. 

 Styles two. Fruit a berry. 



1. RIBES L. 

 Characters of the family. 



1. R. Missouriense Nutt. Wild Goose-beery. Shrub 3°-8° high, 

 thorny : leaves orbicular, 3-5-lobed, serrate above : peduncles slender, 

 few-flowered : flowers greenish-white : stamens much exserted. — Abun- 

 dant in rocky woods throughout. April-May. 



Family 57. PLATANACEAE Lindl. 

 Large trees with alternate palmately-lobed leaves, sheathing stipules 

 and monoecious flowers in spherical heads. Calyx of 3-8 small sepals 

 and corolla of 3-8 similar petals. Stamens 3-8. Ovaries 3-8, 1-celled 

 and containing 1 pendulous ovule. Fruit hairy at base. 



