1686 



SORBARIA 



soil and thrive al?o in partly shaded situations. Prop, by 

 hardwood cuUmgs; also by root-cuttings, suckers and 

 seeds. Four species in Asia and one in N. America, 

 formerly usually united with Spiraea but easily distin- 

 guished by their stipulate, pinnate Ivs. and the 5 carpels 

 being opposite to the sepals. 



A. Lvs. pinnate. 

 B. Panicles with upright ramifications, dense. 



c. Fls. % in. across. 



sorbifdlia, A. Braun (Spiriea sorbifdlia, Linn. Ba- 

 sillma sorbifdlia, Raf.). Fig. 2350. Upright shrub, 3-5 

 ft high: Ifts. 13-23, lanceolate or ovate-lanceolate, long- 

 acuminate, doubly serrate, stellate-pubescent beneath 



2350. Sorbaria sorbifolia (X 1-5). 

 Usually known as Spircea sorbifolia. 



when young or glabrous, 3-4 in. long: panicles 5-12 in. 

 long: fls. % in. across. June, July. N. Asia, from Ural 

 to Japan. A.G. 11:125. On. 16, p. 217. -Escaped from 

 cultivation in some localities in the Middle States. 



cc. Fls. %. in. across. 



grandifldra, Maxim. (Spir&a grandifldra, Sweet. Sp. 

 sorbifdlia, var. alplna, Pall. Basillma alplna, Koehne). 

 Shrub, 1-3 ft. high: Ifts. 13-17, oblong to lanceolate, 

 acuminate, doubly serrate, glabrous, 2-3 in. long: pan- 

 icles 3-5 in. long: fls. % in. across. June. July. E. Si- 

 beria. Gt. 9:295. 



BB. Panicles with spreading ramifications. 



c. Young branches pubescent, green. 

 Lindleyana, Maxim. (Spirwia Lindleyana, Wall. Ba- 

 sillma Lindleyana, Kuntze). Four to 8 ft. high: Ifts. 

 15-21, lanceolate, long-acuminate, rounded at the base, 

 doubly serrate, with simple hairs beneath when young, 

 3-4 in. long : panicles 8-12 in. long and about 8 in. 

 broad: fls. % in. across. July, Aug. Himalayas, China. 

 F.S. 2:108. B.R. 31:33. Gn. 47, p. 222; 49, p. 229; 55, 

 p. 116. 



CC. Young branches glabrous, usually red. 

 Aitchisoni, Hemsl. (Spirfra Aitchisoni, Hemsl. 8. 

 sorbifdlia, var. angustifdlia, Wenzig). Shrub, 6-8 ft. 

 high, with upright or ascending, little-branched stems, 

 usually bright red when young: Ifts. 15-21, lanceolate 

 to linear-lanceolate, acuminate, narrowed at the base, 

 simply or obscurely doubly serrate, glabrous, 2-4_in. 



SORBUS 



long: panicles to 12 in. long, leafy at the base: fls. % in. 

 or more across. July-Sept. Afghanistan, Cashmere. 

 G.C. III. 28:255. M.D.G. 1901:18.-A very desirable 

 shrub with handsome graceful foliage, much hardier 

 than the preceding species. 



AA. Lvs. bipinnate. 



Millefdlium, Focke (Spircea Millefblium, Torrey. 

 Chamtebatiaria Millefdlium, Maxim. Basillma Millefd- 

 lium, Kuntze). Aromatic, glandular-pubescent- spread- 

 ing shrub, 2-6 ft. high: Ivs. lanceolate in outline, 1-3 

 in. long, with minute, densely set, oblong and obtuse 

 Ifts. : fls. % in. across, in 2-5-in. long panicles. July, 

 Aug. Calif, to Wyoming and Arizona. G. F. 2:509. 

 G. C. III. 22:237. Rarely cult.; it has proved hardy in 

 Mass., but, like other plants from the same region, it 

 is likely to be killed by too much moisture during the 

 winter. ALFRED REHDER. 



SOEBUS (ancient Latin name of /$. domestica). In- 

 cluding Aria, Aronia, Cormus, Micromelis and Tor- 

 minaria. Ros&cece. Ornamental deciduous trees or 

 shrubs, with alternate simple or odd-pinnate leaves, 

 white or rarely pinkish flowers in terminal corymbs and 

 berry-like, usually red fruit. Most of them are hardy 

 north except some Asiatic species and Sorbus domes- 

 tica, which seem tender north of Mass. They are 

 chiefly inhabitants of mountainous regions, and the 

 northern species, as S. Americana and sambucifolia, do 

 not thrive well in warmer and drier climates, while S. 

 Aria, torminalis and allied kinds endure drought and 

 heat well. They all have handsome foliage, which usu- 

 ally turns orange-red in fall. The fruits are showy and 

 often remain on the branches the whole winter if not 

 eaten by birds. They are not particular as to the soil 

 and are well suited for planting on rocky hillsides. 

 Those of the Aucuparia group are more adapted for 

 cool and moist mountain regions ; those of the Aria and 

 Torminaria group, which grow specially well on lime- 

 stone soil, are suited to warmer and drier climates. S. 

 hybrida is sometimes used as a small-sized avenue tree 

 on account of its regular pyramidal habit. S. arbutifo- 

 lia and S. melanocarpa are handsome shrubs for bor- 

 ders of shrubberies; they prefer moist soil, but S. me- 

 lanocarpa also grows in drier rocky situations. Prop, 

 by seeds sown in fall or stratified; also by layers, and 

 &'. arbutifolia and <S. melanocarpa from greenwood cut- 

 tings. Varieties and rarer kinds are usually budded or 

 grafted on allied species, but most kinds will grow on 

 S. Aucuparia or Americana and on Hawthorn. The 

 trees are very subject to borers. 



About 30 species distributed throughout the northern 

 hemisphere, in N. America south to Fla. and New Mex., 

 in Asia south to the Himalayas. Lvs. simple or odd- 

 pinnate, stipulate: fls. in compound corymbs; sepals 

 and petals 5; stamens 15-20, with red or yellow anthers; 

 styles 2-5, free or connate at the base: fr. a 2-5-loculed 

 pome, usually rather small, with 1 or 2 seeds in each 

 cell. Closely allied and often referred to Pyrus, from 

 which it is chiefly distinguished by its compound inflor- 

 escence and by the fls. being more or less perigynous 

 except in the Micromeles group, which has a decidedly 

 inferior ovary like Pyrus; the fruits, too, are usually 

 smaller and berry-like. 



INDEX. 



Americana, 3. fructu luteo, 1. pinnatifida, 6. 



arbutifolia, 13. Orceca, 12. pumila, 4. 



Aria, 12. grandifolia, 14. pyrifolia, 13. 



Aucuparia, 1. Grayi, 4. pyriformis, 5. 



aurea, 12. heterophylla, 1. quercifolia, 6. 



aurea-striata, 11. hybrida, 6. quercifolia floribun- 



chryspphylla, 12. intermedia, 10. da nana, 7. 



Clusii, 8. laciniata, 1. quercoides, 6. 



Cretica, 12. lanuginosa, 6. Rossica, 1. 



Decaisneana, 12. latifolia, 9. rotundifolia, 9. 



decurrens, 6. lutescens, 12. sambuoifolia, 4, 6. 



domestica, 5. maliformis, 5. Sargenti, 7. 



dulcis, 1. melanocarpa, 14. tfcandica, 10. 



edulis, 12. micrantha, 3. Sorbtts, 5. 



erythrocarpa, 13. microcarpa, 3. spuria, 7. 



fastigiata, 1. Moravica, 1. subpubescens, 14. 



Fennica, 6. Nepalensis. 12 & Sueeica, 10. 



Pifeaiia, 1. siippl. list. Thianschanica, 2. 



flabellata, 11. nigra, 14. ' Thuringiaea, 6. 



flabellifolia, 11. nivea, 12. Tianschanica, 2. 



floribunda, 14. occidentalis, 4. torminalis, 8. 



pendula, 1. 



