228 ROSACEAE. [Vor. II. 
19. SANGUISORBA L,. Sp. Pl. 116. 1753. 
Erect, mostly perennial herbs, sometimes decumbent at the base, with alternate odd-pin- 
nate stipulate leaves and small perfect or polygamo-dioecious flowers in dense terminal 
peduncled spikes or heads. Calyx-tube turbinate, constricted at the throat, persistent, 4- 
lobed, the lobes petaloid, deciduous. Petals none. Stamens 4-~, inserted on the throat of 
the calyx; filaments filiform, elongated, exserted; anthers short; carpels 1-3, enclosed in 
the calyx-tube. Style filiform, terminal. Achene usually 1, enclosed in the dry angled 
calyx. Seed pendulous. [Latin, blood-staunching, from its supposed properties. ] 
About 20 species, natives of the north temperate zone. In addition to the following, 2 or 3 
others occur in the western parts of North America. 
Flowers capitate, greenish; stamens numerous; leaflets 6'’-10'' long. TS: Sanguisorba. 
Flowers white, spicate; stamens 4; leaflets 1’-3' long. 2. S. Canadensis. 
1. Sanguisorba Sanguisorba (L,.) 
i. Britton. Salad Burnet. (Fig. 1963.) 
Poterium Sanguisorba \,. Sp. Pl. 994. _ 1753- 
Sanguisorba Sanguisorba Britton, Mem. Torr. 
Club, 5: 189. 1894. 
Glabrous or pubescent, erect, slender, peren- 
nial, branched, 10’-20’ high. Stipules usually 
small, laciniate; leaflets 7-19, ovate or broadly 
oval, deeply incised, short-stalked or sessile, 
6’’-10’ long; flowers greenish, in dense pe- 
duncled globose-ovyoid heads 3/’-6’’ long, the 
lower ones staminate, the upper perfect; stamens 
numerous, drooping; stigma tufted, purple; 
calyx-lobes ovate, acute or acutish; fruit 1//-2// 
long. 
In dry or rocky soil and in ballast, southern On- 
tario, New York and Pennsylvania to Maryland. 
Naturalized or adventive from Europe and native 
also of Asia. Summer. Called also Garden Burnet, 
Bloodwort, Pimpernelle, and Toper’s Plant. 
2. Sanguisorba Canadensis lL. 
American Great Burnet. (Fig. 1964.) 
Sangutsorba Canadensis L. Sp. Pl. 117. 1753. 
Poterium Canadense A. Gray, Man. Ed. 5, 150. 1867. 
Glabrous or slightly pubescent toward the 
base, erect, branched above, 1°-6° high, the 
branches erect. Stipules often foliaceous and 
dentate; basal leaves long-petioled, sometimes 2° 
long; leaflets 7-15, ovate, oblong, or oval, obtuse 
or acutish, cordate or obtuse at the base, serrate 
with acute teeth, stalked, 1/-3’ long; flowers 
white, perfect, bracteolate at the base, in dense 
terminal showy spikes 1/-6’ long; stamens 4; fila- 
ments long-exserted, white; achene enclosed in 
the 4-angled calyx. 
In swamps and low meadows, Newfoundland to 
Michigan, south to Georgia. July—Oct. 
20. ROSA L, Sp. Pl. 491. 1753. 
Erect or climbing shrubs, generally with subterranean rootstocks. Stems commonly 
prickly. Leaves alternate, odd-pinnate. Stipules adnate to the petiole. Flowers corymbose 
or solitary, red, pink or white (in our species). Calyx-tube cup-shaped or urn-shaped, con- 
stricted at the throat, becoming fleshy in fruit, 5- (rarely 4-) lobed, the lobes imbricated, 
spreading, deciduous or persistent. Petals 5 (rarely 4), spreading. Stamens «, inserted on 
the hollow annular disk. Carpels «, sessile at the bottom of the calyx; ovaries commonly 
pubescent; styles distinct or united. Achenes numerous, enclosed in the berry-like fruiting 
calyx-tube. Seed pendulous. [The ancient Latin name of the rose. ] 
