Parr 3, 1908] ROSACEAE 257 
Follicles on the dorsal side dehiscent only at the apex; leaves twice 
or thrice pinnately dissected. 8. CHAMAEBATIARIA. 
Petals strap-shaped, convolute in the bud; carpels free; leaves ter- 
nately compound. 9, PORTERANTHUS. 
7. SCHIZONOTUS Lindl. Introd. Nat. Syst. 81. 1830. 
Spiraea § Sorbaria Seringe, in DC. Prodr. 2: 545. 1825. 
Basilima Rat. New Fl. 3: 75. 1838. 
Sorbaria A. Br.; Aschers. Fl. Brand. 177. 1864. 
Shrubs, natives of Asia, with odd-pinnate leaves, conspicuous leafy stipules, and panic- 
ulate inflorescence. Flowers perfect. Hypanthium hemispheric. Sepals 5, imbricate, 
soon reflexed. Petals 5, imbricate. Stamens 40-50, inserted on the margin of the disk, 
unequal. Pistils 4-8, usually 5, opposite the sepals, connate about one-third their length ; 
styles terminal or nearly so; stigmas capitate; ovules several, pendulous. Follicles thin, 
cartilaginous, dehiscent on both sutures. Seeds few; endosperm present. 
Type species, Spiraea sorbifolia L. 
1. Schizonotus sorbifolius (L.) Lindl. ; Steud. Nom. 
Bot. ed. 2. 2: 531. 1841. 
Spiraea sorbifolia I. Sp. Pl. 490. 1753. 
Spiraea pinnata Moench, Meth. 663. 1794. 
Bastlima sorbifolia Raf. New F1.3: 75. 1838. 
Sorbaria sorbifolia A. Br.; Aschers. Fl. Brand. 177. 1864. 
A large shrub, 1-2 m. high; leaves pinnate with 13-21 leaflets, which are lanceolate, 
acuminate, 4-8 cm. long, sharply but finely double-serrate, dark-green, glabrous or stellate- 
puberulent on the rachis and ribs; stipules lanceolate, toothed ; inflorescence 1-3 dm. long; 
sepals ovate, 1.5 mm. long, glabrous; petals white, rounded-obovate, about 3 mm. long; 
filaments filiform, about twice as long as the petals; follicles oblong-cylindric, pilose ; styles 
terminal, recurved. 
TYPE LOCALITY: Swamps of Siberia. 
DISTRIBUTION : Native of northern Asia; cultivated for ornament and occasionally escaped in 
northeastern United States and eastern Canada. 
ILLUSTRATION : Pall. Fl. Ross. £1. 24. 
8. CHAMAEBATIARIA (Porter) Maxim. Acta Hort. 
Petrop. 6: 225. 1879. 
Spiraea § Chamaebatiaria Porter, Bot. Calif. 1: 170. 1876. 
Low shrubs, more or less stellate-pubescent and scurfy, with bipinnatisect leaves and 
paniculate flowers. Hypanthium turbinate. Sepals 5, erect, imbricate. Petals 5, 
rounded, erect. Stamens about 60, inserted on the margin of the disk. Pistils 5, more or 
less united below; styles terminal; stigmas capitate; ovules about 8, pendulous. Fol- 
licles coriaceous, dehiscent on the ventral suture and at the apex on the dorsal one. Seeds 
few, terete, not appendaged; endosperm fleshy and somewhat oily, adherent to the seed- 
coat. 
Type species, Spiraca Millefolium Torr. 
Secondary divisions of the leaves 15-17 pairs, 0.5 mm. long, entire ; twigs 
scarcely glutinous. 
Secondary divisions of the leaves 6-10 pairs, 1-2 mm. long, usually toothed ; 
twigs very glutinous. 2. C. glutinosa, 
1. C. Millefolium. 
1. Chamaebatiaria Millefolium (Torr.) Maxim. Acta Hort. 
Petrop. 6: 225. 1879. 
Spiraea Millefolium Tort. Pacif. R. R. Rep. 4: 83. 1857. 
Sorbaria Milicfolium Focke, in EK. & P. Nat. Pfl. 3°: 16, 1888. 
Basilima Millefolium Greene, Fl. Fran. 57. 1891. 
A densely branched shrub, less than 1 m. high; bark of the young twigs brown, 
more or less densely covered by a stellate tomentum; that of the old stems glabrous and 
