198 



ROSACEAE. 



[VOL. II 



i. Porteranthus trifoliatus (I,.) Brit- 

 ton. Indian Physic. Bowman' s- 

 root. (Fig. 1888.) 



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

 Gillenia trifoliata Moeneh, Meth. Suppl. 286. 1802. 

 Porteranthus trifoliatus Britton, Mem. Torr. Club, 

 5: 115. 1894. 



Herbaceous from a perennial root, erect, 

 branching, 2-4 high, glabrous or somewhat 

 pubescent Stipules subulate, 2 // -4 // long, en- 

 tire or serrate; leaflets short stalked, oval, ovate, 

 lanceolate or slightly obovate, acuminate at the 

 apex, narrowed at the base, 2 / ~3 / long, irregu- 

 larly serrate; upper leaves often 3-lobcd, or some- 

 times 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, "New York to Michigan, Georgia and 

 Missouri. Ascends to 4500 ft in North Carolina. 

 Stipules rarely larger, lanceolate. May-July. 



2. Porteranthus stipulatus (Muhl.) 



Britton. American Ipecac. 



(Fig. 1889.) 



Spiraea stipulate Mulil. ; \Villd. Kmim. 542. 1809. 

 Gillenia stipulacea Nutt. Gen. i: 307. 1818. 



Porteranthus stipulatus Hritton, Mem. Torr. Club, 

 5:115. 1894. 



Resembling the preceding species, but gener- 

 ally more pubescent. Stipules foliaceous, broad, 

 ovate, acuminate or acute, 4"- 12" long, sharply 

 incised-serrate; leaflets commonly narrower 

 than those of the preceding, iuciscd-serrate, or 

 those of the lower leaves deeply pinnatifid; flow- 

 ers commonly fewer and slightly smaller; pods 

 less pubescent or sometimes quite glabrous. 



In woods, western New York to Indiana and 

 Kansas, south to Alabama, Louisiana and the 

 Indian Territory. June-July. 



5. RUBUS L. Sp. PI. 492. 1753. 



Perennial herbs, shrubs or trailing vines, often prickly, with alternate simple lobed or 

 3~7-foliolate leaves, the stipules adnate to the petiole. Flowers terminal or axillary, solitary, 

 racemose or paniclcd, white, pink or purple, perfect or sometimes dioecious. Calyx persis- 

 tent, not bracted, deeply 5-parted, its tube short and broad. Petals 5, deciduous. Stamens 

 co, usually numerous, inserted on the calyx, distinct. Carpels cc, rarely few, inserted on a 

 convex or elongated receptacle, ripening into drupelets and forming an aggregate fruit. 

 Ovules 2, one abortive. Style nearly terminal, slender. Seed pendulous. [The ancient 

 name of the bramble, from ruber, red.] 



About 250 species, of wide geographic distribution, most abundant in the north temperate zone. 

 Besides the following, some 10 others occur in North America beyond our area. The stems of many 

 species are biennial. 

 Leaves simple, crenate or palmately lobed. 



Shrubby, 2-5 high, branched; flowers corymbose. 



Flowers numerous, red-purple. i. R. odoratus. 



Flowers few, white; western. 2. R. parviflorus. 



Herbaceous, 3' -9' high, simple: flowers solitary, white. 3. R. Chamaemorus. 



