8 BUTTERCUP ORDER 



i. Beak about one-third as long 



as achene R. Macounii 



(s) Petals not longer than the 



sepafls ; head oblong R. pennsilvdnicus 



2. Leaves compound R. ranunculinus 



II. Petals white ; more or less submersed aquatics R. aqudtilis 



THALICTRUM Linne 1753 MEADOW RUE 



(The Greek name) 



Sepals 4-5, greenish-white, petals none, stamens many, pistils usually 

 many, achenes more or less swollen, 1-seeded ; flowers perfect, or imperfect, 

 usually dioecious, in a panicle or raceme ; leaves thrice compound ; perennials. 



1. Flowers with both stamens and pistils 



a. Stem leafless or nearly so, 1-2 dm. high T. dlpinum 



b. Stem leafy, 3-9 dm. high T. sparsiflorum 



2. Flowers with either stamens or pistils, usually on 



different plants 



a. Achenes flattened T.Fendleri 



b. Achenes not flattened, roundish 



(1) Stem leaves sessile or nearly so; some 



flowers perfect T. purpurdscens 



(2) Stem leaves petioled; dioecious T.venulosum 



TROLLIUS Linne 1753 GLOBE-FLOWER 



(Lat. form of the German trol, something round, from the flower) 

 Sepals 5-15, petal-like, yellow to white, petals 15-25, narrow and claw- 

 like, shorter than the many stamens, pistils 5-25, ripening into as many 

 beaked many-seeded follicles; flowers regular, single; leaves deeply 5-7- 

 parted or divided; perennial. 

 Plant 1-2 ft. high; flowers 2-4 cm. wide, usually white T. laxus 



BERBERIDACEAE BARBERRY FAMILY 



Sepals 6, petal-like, petals 6, separate, stamens 6, pistil 1, stigma 1, 

 disk-shaped, fruit a berry ; flowers in racemes ; shrubs with alternate simple 

 or compound spiny leaves. 



BERBERIS Linne 1753 BARBERRY 

 (Latinized from the Arabic name) 



PL 4, fig. 1-3. 



Characters of the family; flowers yellow; berry blue. 

 1. Stems spiny; leaves apparently simple, spatulate B.Fendleri 



