g BUTTERCUP ORDER 



i. Beak about one-third as long 



as achene R. Macdunii 



(s) Petals not longer than the 



sepals ; 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. alpinum 



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



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 man/ stamens, pistils 5-25, ripening into as many 

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

 parted or divided; perennial. 

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



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 



