ROSE FAMILY 



415 



conspicuously glandular-atomiferous. Leaves cuneate-obovate, 10-15 mm. long, decurrent on 

 the petioles, simply and evenly toothed above the middle, glandular-atomiferous on both surfaces, 

 glabrous or' short-villous on the veins ; raceme simple or more or less compound. 



Rocky mountain ridges, Boreal Zones; southeastern Oregon to the northern Sierra Nevada, California, 

 east to Utah. Type locality: Steens Mountain, Oregon. July-Aug. 



9. FILIPENDULA [Tourn.] Mill. Gard. Diet. Abr. ed. 4. 1754. 



Perennial herbs with rootstocks, pinnate leaves, and large stipules. Flowers in large 

 paniculate often corymbose cymes. Hypanthium flat. Sepals and petals 5. Stamens 20-40. 

 Pistil 5-15, distinct, stigma large, capitate. Carpels indehiscent, coriaceous, 1-seeded. 

 [Latin, meaning a hanging thread.] 



About 10 species, natives of the north temperate zone. Besides the following Filipendula rubra (Hill) 

 Robinson occurs in eastern North America. Several Old World species are cultivated. Type species: Spiraea 

 Filipendula L. 



1. Filipendula occidentalis (S. Wats.) Howell. Western Meadow-Queen. 



Fig. 2378. 



Spiraea occidentalis S. Wats. Proc. Amer. Acad. 18: 192. 1883. 

 Filipendula occidentalis Howell, Fl. N.W. Amer. 1: 185. 1898. 



Stems 1-2 m. high, simple, straw-colored, pubescent above. Leaves pinnate with a large 

 terminal division and small lateral ones, pubescent on both surfaces especially on the veins, 

 terminal leaflet 8-15 cm. broad, digitately 3-7-cleft with doubly serrate lobes; the lateral leaflets 



2379 



2375. Holodiscus discolor 



2376. Holodiscus dumosus 



2378 



2377. Holodiscus glabrescens 



2378. Filipendula occidentalis 



2380 



2379. Horkelia frondosa 



2380. Horkelia elata 



