!52 ROSE ORDER 



x. Leaves opposite; stems spiny; style not 



Partly COLEOGYNE 



y. Leaves alternate; stems not spiny; style 



long and plumy Cercocarpus 



(2) Flowers several-many in a cluster 



(a) Leaves 3-7-cleft; style becoming long and 



P^my Fallugia 



(b) Leaves lobed, toothed or entire; style not 



plumy 

 x. Flowers in panicles 



(x) Ovary and fruit 1 -seeded Holodiscus 



(y) Ovary and fruit several-seeded Spiraea 



v. Flowers in corymbs or spikes 



(x) Flowers in corymbs; leaves mostly 



3-5-lobed; stems 1-6 ft. high Opulaster 



(y) Flowers in spikes; leaves entire; 



stems dwarf, in mats. Petrophytum 



b. Leaves compound 



(1) Flowers yellow; leaflets 5-7, entire Dasyphora 



(2) Flowers white 



(a) Flowers in a panicle; leaves twice-pin- 



nately dissected Chamaebatiaria 



(b) Flowers 1-few in a cluster; leaves pin- 



nate of 3-5 leaflets Rubus 



(3) Flowers rose to red, rarely white; leaves 



pinnate of 3-11 (usually 5-9) leaflets Rosa 



Agrimonia Linne 1753 Agrimony 

 (Of uncertain origin) 



Sepals 5, forming a hemispheric to top-shaped tube with hooked 

 bristles above, petals 5, yellow, stamens 5-15, carpels 2, stigma 2-lobed, 

 fruit 1-2 achenes ; flowers in spiked racemes; leaves alternate, odd-pinnate, 

 with smaller lobes between the larger leaflets ; perennial. 

 Stems 1-5 ft. high; leaves hairy to smooth; flowers 

 6-12 mm. wide A. eupatoria 



Argentina Lamarck 1778 Silverweed 

 (Lat. argentinus, silvery, from the leaves) 



Sepals 5, united into a concave tube with 5 alternating bracts, petals 

 5, yellow, stamens 20-25, pistils many, style thread-like, attached near the 



