ROSACEAE (HOSE 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. Sylvester 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 5, 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. SORBIF6LIA (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, 5-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. Grille, or Gillenius.} PORTERANTHUS Britton. 



1. G. trifoliata (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. stipulata (Muhl.) Trel. (AMERICAN IPECAC.) Leaflets lanceolate, 

 deeply incised ; stipules large and leaf-like, doubly incised. (Gr. 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 6 sepals. Petals roundish or ob- 

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

 and berry-like, the 2-5 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 ; Jlesh 

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



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

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

 from Eu.) 



