ROSACEAE 609 
1. A. Aruncus (L.) Karst. Plant 2 m. tall or less, glabrous or nearly so up 
to the inflorescence at ere ups ovate, 2—7 em . long, aeuminate, doubly 
serrate, glabrous, smooth a with 
scattered hairs mM m when oun: 
triangular-lanceolate, acuminate: petals of 
d oe goes searcely mm. long, 
wed at the dua e: follicles isl 
elliptie, about 3 ion ng, less than 
thick, pend beaked. —Thickets and doe 
places, ally nat. in various provinces in 
U. S., fr om N. C. northward. Nat. of Eu. 
2. A. pubescens Rydb. Plant 3 m. tall 
or less, ui epi io ubescent: leaflets ovate, 
3-10 em. long, short-acuminate, singly or 
doubly serrate, cube escent beneath: ded v 
the pistillate flowers triangular lanceo C 
acute: petals of the staminate flowers slighty over 1 mm. long, scarcely nar- 
rowed at the base: follicles d sometimes appearing ellipsoid when dry, 
the body about 2 mm. long, with the Ens beak mostly spreading.—W oods, 
various provinces N of Coastal Plain, Okla. to Ia. and Va. 
3. A. allegheniensis Rydb. Plant 2.5 m. tall or less, glabrous or nearly s 
at maturity below the inflorescence: leaflets ovate to elliptic, 3-10 cm ons 
brous or with seat i 
oval, sometimes appearing ovoid when dry, the body about 2 mm. long, with 
the slender beak mostly erect. [Spiraea Aruncus (Chapm. Fi). lo ~ woods, 
various provinces, in Coastal Plain only N, Ga. to Ala., Ky., 
4. PORTERANTHUS Britton. Perennial herbs. Leaf-blades. 3-parted 
or 3-foliolate. Flowers perfect, few, borne in open lax pia Mica shorter 
than the hypanthium. Petals narrow, white or pink. Stam , in 
one row: filaments very short. Carpels i e 5: styles sult, nd 
erect. [Gillenia Moench.]—Two species.—Spr.-sum.—INDIAN PHYS 
Pep dora sued caudate-acuminate: stipules subulate or He entire or 
orsal suture of the follicle not prominent. 1. P.trifoliatus. 
Sepals Mere ciliolate, acute or slightly acuminate: stipules foli- 
eous, coarsely laciniate: dorsal suture of the follicle keel- like. 2. P. dpi 
1. P. trifoliatus (L.) Bri Plant 3-14 dm. tall: leaflets 3-9 em. long; 
blades oval or elliptie to A or those of upper leaves sometimes pem d 
S l 25 _incised-serrates petals 
white, mostly 15— m. long; blades nearly 
linear or Ponty aa upward: folli- 
cles 5.5-7 mm. long, stout-beaked, not stipi- 
A Eie) fine-pubescent. [G. trifoliata 
Moench. ]— (BOWMAN ’S-ROOT. FAL IPE- 
CAC. Woods , thickets, and river-banks, vari- 
ous provinces, S Coa stal aa iui N, Ga. 
to Mo., Mich., 
diio n Britton. Plant 
cum minate, those 2 the lower leaves incised 
or laciniate, those of the upper coarsely 
doubly-toothed : Dedi white or pinkish, 11- 
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