512 FLORA. 



6. Agrimonia parviflora Soland. MANY-FLOWERED AGRIMONY. (I. F. f. 

 1962.) Virgately branched, 6-12 dm. high, with long racemes. Stem densely 

 hirsute with coarse brownish hairs, villous above; leaflets lanceolate or linear-lan- 

 ceolate, acuminate, sharply serrate, rather thin, glabrous above, pubescent beneath, 

 especially on the veins, very glandular ; flowers very numerous, 6-10 mm. broad ; 

 the buds rounded-truncate ; fruit small, glandular, dilated-turbinate ; bristles 

 reflexed, spreading and erect. In moist or dry soil, N. Y. to Mich., Kans., Ga. 

 and Miss. July-Oct. 



35. SANGUISORBA L. 



Erect, mostly perennial herbs, sometimes decumbent at the base, with alternate 

 odd-pinnate 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 

 4-30 , 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 I, 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 12-20 mm^, long. 



i. S. Sanguisorba. 

 Flowers spicate, white ; stamens 4; leaflets 25-75 nun. long. 2. 5". Canadensts. 



1. Sanguisorba Sanguisorba (L.) Britton. SALAD BURNET. (I. F. f. 

 1963.) Glabrous or pubescent, erect, slender, perennial, branched, 2.5-5 dm. 

 high. Stipules usually small, laciniate; leaflets 7-19, ovate or broadly oval, deeply 

 incised, short-stalked or sessile; flowers 6-12 mm. long, the lower ones staminate, 

 the upper perfect; stigma tufted, purple; calyx-lobes ovate, acute or acutish; fruit 

 2-4 mm. long. In dry or rocky soil and in ballast, southern Ont., N. Y. and Penn. 

 to Md. Naturalized from Europe and native also of Asia. Summer. 



2. Sanguisorba Canadensis L. AMERICAN GREAT BURNET. [I. F. f. 

 1964.] Glabrous or slightly pubescent toward the base, erect, branched above, 

 3-18 dm. high, the branches erect. Stipules often foliaceous and dentate ; basal 

 leaves long-petioled, sometimes 6 dm. long; leaflets 7-15, ovate, oblong or oval, 

 serrate with acute teeth, stalked ; flowers perfect, bracteolate at the base ; filaments 

 long-exserted, white ; achene enclosed in the 4-angled calyx. In swamps and 

 low meadows, Newf. to Mich., south to Ga. July-Oct. 



26. ROSA L. 



Erect or climbing shrubs, generally with subterranean rootstocks. Stems com- 

 monly 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, constricted at the throat, becoming fleshy in fruit, 5- 

 ( rarely 4-) lobed, the lobes imbricated, spreading, deciduous or persistent. Petals 

 5 (rarely 4), spreading. Stamens oo , inserted on the hollow annular disk. Carpels 

 oo , 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.] 



A large genus, natives of the northern hemisphere. Besides the following, about 6 

 others occur in southern and western N. Am. 



* Styles cohering in a column : leaflets mostly 3 ; stem climbing, i. R. setigera. 

 * * Styles all distinct ; leaflets S-ll. 



Sepals persistent, erect on the fruit, or spreading. 

 Infrastipular spines generally none. 



Stems unarmed or nearly so ; sepals erect on the fruit. 2. R. blanda, 



Stems armed with numerous prickles. 



