GENUS 3. 



ROSE FAMILY. 



247 



3. ARUNCUS [L.] Adans. Fam. PL 2: 295. 1763. 



Tall perennial herbs, with large 2-3-pinnate leaves, stipules minute or wanting, and very 

 numerous white dioecious flowers in panicled spikes. Calyx mostly 5-lobed. Petals as many 

 as the calyx-lobes. Stamens numerous, inserted on the calyx; filaments filiform. Pistils 

 usually 3, alternate with the calyx-lobes. Follicles glabrous, at length reflexed, usually 

 2-seeded. Seeds minute, not shining. [Greek, goat's-beard.] 



About 3 species, the following typical one widely dis- 

 tributed in the north temperate zone, one in northwest- 

 ern America, the other Japanese. 



i. Aruncus Aruncus (L.) Karst. 

 beard. Fig. 2221. 



Goat's- 



Spiraea Aruncus L. Sp. PI. 490. 1753. 



Aruncus Sylvester Kostel. Ind. Hort. Prag. 15. Name 



only. 1844. 

 Aruncus Aruncus Karst. Deutsch. Fl. 779. 1880-83. 



Glabrous or pubescent; stem erect, somewhat 

 branched, 3-7 high. Leaves long-petioled, the 

 lower i long or more, pinnate, 3-7-foliolate ; leaflets 

 ovate, lanceolate or oval, thin, stalked or sessile, 

 acuminate or acute at the apex, rounded, slightly 

 cordate or sometimes narrowed at the base, sharply 

 doubly serrate or incised, i'-3' long; spikes slender, 

 elongated, erect or spreading; flowers i"-2" wide; 

 follicles short. 



In rich woods, mountains of Pennsylvania to Iowa, 

 south to Georgia and Missouri, and in northern Europe 

 and Asia. Consists of several races, differing in pubes- 

 cence and slightly in the size and shape of the fruit. 

 Ascends to 4200 ft. in North Carolina. May-July. 



4. SCHIZONOTUS Lindl. Introd. Nat. Syst. 81. 1830. 



Shrubs, with odd-pinnate leaves, the large stipules conspicuous. Flowers perfect, in 

 terminal panicles. Calyx-tube hemispheric, its 5 lobes imbricated, early reflexed. Petals 5, 

 imbricated. Stamens numerous, borne on the margin of the disk. Pistils mostly 5, opposite 

 the calyx-lobes, connate below; styles terminal or nearly so; ovules several, pendulous. 

 Follicles thin, dehiscent along both sutures. Seeds few, with endosperm. [Greek, referring 

 to the pinnately compound leaves.] 



About 3 species, natives of Asia, the following typical. 



i. Schizonotus sorbifolius (L.) Lindl. 

 Sorb-leaved Schizonotus. Fig. 2222. 



Spiraea sorbifolia L. Sp. PI. 490. 1753. 



Schisonotus sorbifolius Lindl. ; Steud. Nomencl. 

 Ed. 2, 2 : 531. 1841. 



Sorbaria sorbifolia A. Braun ; Aschers. Fl. Brand. 

 177. 1864. 



Stems 6 high, or less, little branched. Leaf- 

 lets 13-21, lanceolate, acuminate, finely double- 

 serrate, glabrous or more or less stellate- 

 puberulent; panicle often i long, densely 

 very many-flowered ; calyx-lobes ovate ; petals 

 white, obovate, about \\" long; filaments about 

 twice as long as the petals; follicles oblong, 

 pilose ; styles recurved. 



Locally spontaneous after cultivation, Ontario 

 to New York and Maryland. Native of northern 

 Asia. Summer. 



