4 2 ROCKROSE ORDER 



Helianthemum Persoon 1807 Frostweed 



(Gr. helios, sun, anthemon, flower, from the golden petals) 

 Characters of the family. 

 Leaves lance-oblong to oblanceolate ; petal flowers 

 terminal H. mdjus 



HYPERICACEAE ST. JOHN'S WORT FAMILY 



Sepals 5, petals 5, yellow, stamens many, often in clusters, ovary 3-5- 

 celled or 1-celled, with 3-5 seed rows on the wall, styles 3-6, fruit a 1-6- 

 celled capsule ; flowers in cymes ; annual or perennial herbs with opposite 

 simple entire dotted leaves. 



Hypericum Linne 1753 St. John's Wort 

 (Gr. hyperikon, St. John's wort) 

 Characters of the family. 



1. Petals twice the length of the sepals or longer H. formosum 



2. Petals little if at all longer than the sepals H. mdjus 



ELATINACEAE WATERWORT FAMILY 



Sepals 2-4, petals 2-4, stamens 2-8, ovary 2-4-celled, styles 2-4, fruit a 

 globose many-seeded capsule opening by 2-4 valves ; flowers tiny, solitary in 

 the leaf axils ; aquatic or marsh herbs with opposite or whorled simple leaves. 



Elatine Linne 1753 Waterwort 

 (Gr. elatine, a kind of toad-flax) 



Characters of the family. 



1. Flowers in 2's ; leaves obovate E. americdna 



2. Flowers usually in 3's ; leaves oblong or oblance- 



olate E. tridndra 



FRANKENIACEAE FRANKENIA FAMILY 



Sepals 5, united, petals 5, white, stamens 5, or more, ovary 1-celled, 

 with 2-3 seed rows on the wall, styles 2-4, fruit a capsule enclosed by the 

 persistent calyx ; flowers solitary or clustered in the axils ; perennial herbs 

 with opposite or clustered simple leaves. 



Frankenia Linne 1753 

 (Named for Franken, a Swedish physician) 



Characters of the family. 

 Stems woody at base ; leaves clustered, linear, 5-6 mm. 

 long F. Jdmesii 



