Spir£a. XL VIII. ROSACEiE. 365 



18. SANGUISORBA. 

 Lai. sanguis, sorbere, q. d. to absorb blood ; the plant is esteemed a vulnerary. 



Calyx tube 4-sided, 2 or 3-bracted at base ; limb 4-parted ; petals 

 ; stamens 4, opposite the calyx segments ; filaments dilated upwards j 

 style 1, filiform; acbenium dry, included in tbe calyx. — Herbs with 

 U7iequally pinnate leaves. 



S. Canadensis. Burnet Saxifrage. 



Glabrous; If Is. oblong, cordate, obtuse, serrate; spikes dense, cylindric, 

 very long ; sta. much longer than the calyx. — % in wet meadows, U. S. and 

 Brit. Am., and cultivated in gardens. Stem 2 — 3f high, smooth, striate, spar- 

 ingly branched. Stipules leafy, serrate. Leaflets 2—4' long, | — ^ as wide, 

 petiolate, mostly stipellate. Spikes 3 — 6' long, terminating the long, naked 

 branches, Bracteoles 3. Calyx greenish white, resembling a corolla. Aug. 



19. POTERIUM. 



Literally a drinking vessel, and hence a beverage ; from the use of the plant. 



Fls. (? ' Calyx tube contracted at the mouth, 3-bracteate, limb 4- 

 parted : petals ; stamens 20 — 30 ; ovaries 2 ; style filiform ; ache- 

 nia dry, included in the calyx. — Herbs with unequally pinnate leaves. 



P. SANGUISORBA. Bumet. 



Herbaceous; st. unarmed, angular, and with the leaves, smooth; Ifts. 

 7 — 11, ovate or roundish, deeply serrate ; zpiJces or hds. subglobose, the lower 

 flowers staminate. — %. Occasionally cultivated as a salad, but is now less valued 

 in medicine than formerly. It is said by Hooker to be native about Lake Huron. 



20. AGRIMONIA. 



Gr. aypos, a field, jxovos, alone ; a name of dignity for its medicinal qualities. 



Calyx tube turbinate, contracted at the throat, armed with hooked 

 bristles above, limb 5-cleft ; petals 5; stamens 12 — 15; ovaries 2 ; 

 styles terminal ; achenia included in the indurated tube of the calyx. 

 — '4 Lvs. pinnately divided. Fls. yellow^ in long^ slender racemes. 



1. A. EuPATORiA. Agrimony. 



Hirsute ; lvs. interruptedly pinnate, upper ones 3-foliate ; Ifts. ovate, oval 

 or oval-lanceolate, coarsely dentate ; slip, large, dentate ; pet. twice longer than 

 the calyx. — Road sides, borders of fields. Can. and U. S., common. Stem I — 3f 

 high, branching, leafy. Leaflets 3, 5, 7, with small ones interposed, nearly 

 smooth beneath, IJ — ^' long, i as wide, sessile, terminal one with a petiolule 

 1 — 3" long. Racemes 6 — 12' long, spicate. Flowers yellow, about 4" diam., 

 on very short pedicels. Calyx tube curiously fluted with 10 ribs, and sur- 

 mounted with reddish, hooked bristles. Jl. 



p. hirsuta. Torr. — Smaller and more hair}'. 



y, parviflora. Hook. (A. parviflora. DC.) — Less hairy ; /s. smaller, on longer 

 pedicels. 



2. A. PARvirr.oRA. Ait. (A. suaveolens. Ph.) 



St. and petioles hirsute ; Irs. interruptedly pinnate ; Ifts. numerous, crowded, 

 pubescent beneath, linear-lanceolate, equally and incisely serrate; slip, acutely 

 mcised; ra^. .spicate-virgate ; /s. small; pet. longer than calyx ;//•. hispid. — 

 Woods and dry meadows, Penn. ! to S. Car. W. to la. and Tenn. "Stem 3— 4f 

 high, the hairs spreading, brownish and glandular. Leaflets 2 — 3' by J — J', 

 with smaller ones intermixed. Petals yellow. The plant has an agreeable 

 balsamic odor. Aug. 



21. SPIRiEA. 



f Gr. cncipa, a rord or wreath ; the flowers arc, or may bo UBcd in garlands. 



Calyx 5-clcft, persistent; petals 5, roundish; stamens 10 — 50, 

 exserted; carpels distinct, 3 — 12, follicular, 1-celled, 1 — 2-valved, 

 1 — 10-seeded ; styles terminal. — "^l Unarmed .shrubs or herbs. Branches 

 and lvs. alternate. Ph. while or rose-color., n^.vcr yellow. 

 22* 



