242 NORTH AMERICAN FLORA (VoLUME 22 
Physocarpus capiiatus Kuntze, Rev. Gen. 219, 1891. 
Opulaster opulsfolius capilatus Jepson, Fl. W. Middle Calif, 276. 1901. 
Physocarpa opultfolia or glabra Raf. New FL. 3: 73, in part. 1838.* 
Spiraea ribifolia Nutt.; T. & G. Fl. N. Am. 1: 414, asa synonym. 1840. 
Neillia opulifolia multiflora Durand, Jour. Acad. Phila. IT. 3:87. 1855. 
Neillia opulifolia Brewer & Wats. Bot. Calif. 1: 171, 1876. 
A shrub, with surculose branches, interlacing among willows and laurels, sometimes 
even 7m. long ; branches glabrous or slightly stellate ; petioles 1-3 cm. long; leaf-blades of 
the flowering branches broadly rounded-ovate or pentagonal in outline, distinctly 3-5-lobed 
with incised or doubly serrate lobes, truncate, rounded or cordate at the base, acute or 
obtuse at the apex, sparingly pubescent or glabrous above, more densely stellate-pubescent 
or sometimes glabrous beneath, 3-6 cm. long and usually fully as broad; leaf-blades of the 
sterile shoots 6-10 cm. long, more deeply lobed, more deeply incised and sometimes with 
longer acuminate terminal lobe; inflorescence dense; bracts linear-lanceolate, very early 
caducous ; pedicels 1-2 cm. long, in fruit 2-3 cm. long, rather densely stellate; hypan- 
thium 4-5 mm. wide, equally densely stellate on both sides; sepals ovate, acute, stellate; 
petals orbicular, about 4 mm. long ; carpels usually 5, perfectly glabrous when mature, 8-10 
mm. long, ovate, rather long-acuminate ; seeds fully 2 mm. long, obliquely pear-shaped ; 
caruncle short and nearly terminal. 
TYPE LOCALITY: Northwest coast [of America]. 
DISTRIBUTION: Among willows and laurels, from southern British Columbia to central Cali- 
fornia and Idaho. 
3. Opulaster australis Rydberg, sp. nov. 
? Sptraea caroliniana Marsh. Arbust. 146; hyponym. 1785. 
A shrub, 1-2 m. high, branches light-brown, angled, glabrous; petioles 1-2 cm. long; 
leaf-blades broadly ovate in outline, glabrous, rounded or truncate at the base, acute at the 
apex, deeply 3-lobed, double-toothed with ovate teeth, dark-green above, paler beneath, 
4-8 cm. long, 3.5-7 cm. wide ; inflorescence dense; pedicels about 1 cm. long, in fruit 1.5-2 
em. long, densely stellate; bracts linear, caducous; hypanthium 3-4 mm. wide, stellate ; 
sepals 2.5-3 mm. long, ovate, acute, stellate on both sides; petals almost orbicular, 4 mm. 
long; carpels usually 5, glabrous, 3-6 mm. long, abruptly acute; seeds rounded-pear- 
shaped; caruncle very short and nearly terminal. 
Type collected on the summit of Stone Mountain, North Carolina, in 1891, Small & Heller 256. 
DISTRIQUTION: Mountains, from Virginia to South Carolina. 
4, Opulaster cordatus Rydberg, sp. nov. 
Opulasier captiatus Holz. Contr. U. S. Nat. Herb. 3: 221, in part. 1895. 
A tall shrub; branches brown, glabrous and shining ; petioles 2-3 cm. long; leaf-blades 
rounded-cordate to somewhat reniform in outline, 4-10 cm. long and about as -broad, 3-5- 
lobed with rounded or acute lobes, serrate with rounded-ovate teeth, glabrous on both sides 
or with scattered hairs beneath, usually more or less cordate at the base, acute at the apex; 
inflorescence dense; pedicels about 2 cm. long, densely stellate; hypanthium 5 mm. wide, 
densely stellate; sepals ovate, acute, densely stellate, 3-4 mm. long; carpels 3-5, densely 
stellate, 8-9 mm. long, abruptly acute. 
Type collected in a deep cafion, Farmington Landing, Lake Coeur d’Alene, Idaho, in 1892, 
Sandberg, MacDougal & Heller 575, in part. 
DISTRIBUTION: Western Idaho to northern California. 
5. Opulaster intermedius Rydb. in Britton, Man. 492. 1901. 
? Spiraea opulifolia tomeniella Seringe, in DC. Prodr. 2: 542. 1825. 
Opulaster Ramaleyi A. Nelson, Bot. Gaz. 34: 367. 1902. 
? Opulaster opulifolius tomentellus C. K. Schneid. Handb. Laubh. 1: 442, 1904, 
Physocarpus intermedius C. K. Schneid. Handb. Laubh, 1: 807. 1906. 
Physocarpus missourtensis Daniels, Univ. Missouri Stud. Sci. 1: 291. 1907. 
A shrub, 1-1.5 dm. high; branches glabrous or nearly so; petioles 1-2 cm. long; leaf- 
blades ovate to orbicular in outline, usually shallowly 3-lobed, 2-6 cm. long, doubly crenate, 
*This and the following synonyms represent the more glabrous form. 
