ROSACEAE (ROSE FAMILY) 457 



face of the ovate or oblong serrate leaves very woolly ; flowers in short racemes 

 crowded in a dense panicle, rose-color, rarely white ; pods woolly. Low 

 grounds, N. B. and N. S. to the mts. of Ga., w. to Minn, and Kan. 



3. ARUNCUS [L.] Adans. GOAT'S BEARD 



Dioecious. Carpels 3-4, splitting at the ventral suture. Flowers sessile or 

 nearly so on the long spike-like branches of a large open panicle, the fertile 

 flowers reflexed in fruit. Petals small, narrow, white. Tall, essentially her- 

 baceous. Leaves 2-3-pinnate, the leaflets rather large, ovate-oblong. (Aruncus, 

 a word used by Pliny to designate the beard of a goat. ) 



1 . A. sylv^ster Kosteletzsky. Stem erect, subsimple, bearing a few large com- 

 pound petiolate leaves and a large pyramidal spicate panicle ; leaflets 6-14 cm. 

 long, green on both sides, sharply and somewhat doubly serrate, acuminate, the 

 base mostly abrupt or subcordate, petiolulate. (Spiraea Aruncus L. ; Aruncus 

 Aruncus Karst.) Rich soil, wooded ravines, etc., N. Y. to Ga., I. T., and 

 Alaska. (Eurasia.) 



4. SORBARIA A. Br. 



Flowers perfect, paniculate. Carpels mostly 6, opposite the calyx-lobes. 

 Leaves regularly odd-pinnate, the leaflets lance-oblong, sessile, sharply serrate. 

 (Name from Sorbus, the Mountain Ash, from the similar foliage.) 



1. S. 80RBIF6LIA (L.) A. Br. Suffruticose or nearly herbaceous, erect; leaves 

 1-4 dm. long, 13-21-foliolate ; leaflets caudate-acuminate, with many straightish 

 mostly simple veins springing from the midnerve ; panicle ample, pyramidal, 

 terminal; petals white. (Spiraea L.) Common in cultivation, and escaping 

 to waste land and copses. (Asia.) 



5. GILLENIA Moench. INDIAN PHYSIC 



Calyx narrow, somewhat constricted at the throat, 6-toothed ; teeth erect. 

 Petals 5, rather unequal, linear-lanceolate, inserted in the throat of the calyx, 

 convolute in the bud. Stamens 10-20, included. Pods 6, included, at first 

 lightly cohering with each other, 2-4-seeded. Perennial herbs, with almost 

 sessile 3-foliolate leaves ; the thin leaflets doubly serrate and incised. Flowers 

 loosely paniculate-corymbed, pale rose-color or white. (Dedicated to an obscure 

 German botanist or physician, A. Gille, or Gillenius. ) PORTERANTHUS Britton. 



1. G. trifoliate (L.) Moench. (BOWMAN'S ROOT.) Leaflets ovate-oblong, 

 pointed, cut-serrate ; stipules small, awl-shaped, entire or slightly incised. 

 Rich woods, N. Y. to Ga., Mo., and Mich. 



2. G. stipulate (Muhl.) Trel. (AMERICAN IPECAC.) Leaflets lanceolate, 

 deeply incised; stipules large and leaf-like, doubly incised. (G. stipulacea 

 Nutt. ; Porteranthus stipulatus Britton.) Moist rich woods, w. N. Y. to Kan., 

 La., and Ala. 



6. PYRUS [Tourn.] L. 



Calyx-like receptacle urn-shaped, bearing 5 sepals. Petals roundish or ob- 

 ovate. Stamens numerous. Styles 2-5. Fruit a large fleshy pome, or smaller 

 and berry-like, the 2-6 cells imbedded in the flesh, papery or cartilaginous, 

 mostly 2-seeded. Trees or shrubs, with showy flowers in corymbed or umbel- 

 like cymes. (The classical name of the Pear-tree.) A large genus, often sub- 

 divided, but with sections less strongly or constantly marked than our few species 

 would suggest. 



1. PIR6PHORUM Focke. (PEAR.) Leaves simple; orifice of concave re- 

 ceptacle partially or almost completely closed by a disk-like cushion ; flesh 

 of large obovoid fruit copious, containing sclerotic (gritty) cells. 



1. P. coMMtiNis L. The common Pear of cultivation. Stray seedlings with 

 degenerate fruit occasionally found in copses or woods near orchards. (Introd. 

 from Eu.) 



