248 



ROSACEAE. 



Vol. II. 



5. PORTERANTHUS Britton, iMeni. Torr. Club 4: 115. 1894. 

 [GiLLE.MA Mocnch, Metli. Suppl. 286. 1802. Not Gillena Allans. i/O.vl 



Erect perennial herbs, with nearly sessile stipulate 3-foliolate or 3-parted leave;, oncl 

 white or pinkish perfect long-pedicelled flowers in loose terminal panicles. Caly.x cylindric, 

 persistent, narrowed at the tliroat, 10-ncrvcd, S-toothed, the teeth imbricated, slightly glandu- 

 lar. Petals 5, linear-lanceolate, spreading, convolute in the bud, somewhat unequal, inserted 

 on the calyx. Stamens 10-20, included ; filaments short ; anthers large. Carpels 5, villous- 

 pubescent, opposite the calyx-lobes. Ovules ascending; style filiform. Follicles 5, 2-4-sceded. 

 Seeds with endosperm. [In honor of Thomas Conrad Porter, Professor in Lafayette College.] 



A genus of 2 species, of North America. Type species: Porieranthus Irifoliatus (L.) Britton. 

 Leaflets serrate; stipules subulate, mainly entire. i. p, Irifoliatus. 



Leaflets incised; stipules broad, foliaceous, incised. 2, P. slipiiliitus. 



/]''^ \ /v'y ^- Porteranthus Irifoliatus (L.) Britton. 



Indian I'liysic. Bowman's-root. False 

 Ipecac. Fig. 2223. 



Spiraea trifoliata L. Sp. PI. 490. 1753. 



Gilleiiia trifoliata Moench. Meth. Suppl. 286. 1802. 



P. Irifoliatus Britton, Mem. Torr. Club 5: 115. 1894. 



Herbaceous from a perennial root, erect, branch- 

 ing, 2-4 high, glabrous or somewhat pubescent. 

 Stipules subulate, 2,"-i\' long, entire or serrate ; 

 leaflets short-stalked, oval, ovate, lanceolate or 

 slightly obovate, acuminate at the apex, narrowed 

 at the base, 2'-3' long, irregularly serrate ; upper 

 leaves often 3-lobed, or sometimes merely serrate ; 

 panicles few-flowered; pedicels slender; petals 

 white or pinkish, 5"-6" long ; calyx reddish ; pods 

 pubescent, subulate-tipped, little exceeding the 

 calyx. 



Woodlands, Ontario and Xew York to Michigan. 

 Georgia and Missouri. Ascends to 4500 ft. in North 

 Carolina. Stipules rarely larger, lanceolate. Meadow- 

 sweet. Indian hippo. Western dropwort. May-July. 



2. Porteranthus stipulatus ( ]Muhl.) Brit- 

 ton. American Ipecac. Fig. 2224. 



Spiraea stipulata Muhl. ; Willd. Enum. 542. 1809. 



Gillciiia stipufacea Nutt. Gen. i ; 307. 1818. 



P. stipulatus Britton, Mem. Torr. Club 5; 115. 1894. 



Resembling the preceding species, but gener- 

 ally more pubescent. Stipules foliaceous, broad, 

 ovate, acuminate or acute, 4"-l2" long, sharply 

 incised-serrate ; leaflets commonly narrower than 

 those of the preceding, incised-serrate, or those 

 of the lower leaves deeply pinnatifid; flowers 

 commonly fewer and slightly smaller ; pods less 

 pubescent or sometimes quite glabrous. 



In woods, western New York to Indiana and Kan- 

 sas, south to Georgia, Louisiana and Oklahoma. In- 

 dian physic. June-July. 



6. FILIPENDULA [Tourn.] Mill. Card. Diet. Abr. Ed. 4. 1754. 

 [L'lm.'\ria Hill, Hort. Kew. 213. 1768.] 

 Tall perennial herbs, with alternate petioled pinnately divided stipulate leaves, and small 

 white, pink or purple perfect flowers in large cymose panicles. Calyx s-lobed. Petals 5. 

 clawed. Stamens numerous, inserted on the flat or slightly concave receptacle ; filaments 

 narrowed at the base. Pistils about 10 (S-15), distinct; ovary 2-ovuled. Ripe carpels capsu- 

 lar, indehiscent. i-seeded. Seed pendulous. [Latin, a hanging thread.] 



About 10 species, natives of the north temperate zone. Besides the following, 2 others occur in 

 northwestern America. Type speoies : Spiraea Filipendula L. 



