Spir^a. XLVIII. rosacea. 265 



18. SANGUISORBA. 

 Lat. sanguis, sorbcre, 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, oppofeite the calyx segments ; filaments dilated upwards ; 

 style 1 , filiform ; achenium dry, included in the calyx. — Herbs with 

 vnequally finnate leaves. 



S. Canadensis. Burnet Saxifrage. 



Glabrou.s; if Is. oblong, cordate, obtuse, serrate; spikes dense, cylindric, 

 very long ; sta. inuch longer than the calyx. — '1|. in wet meadows, U. S. and 

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

 ingly branched. Stipules leaty, serrate. Leaflets 2 — V long, i — i as wide, 

 petiolale, 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. S ■ 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 finnate leaves. 



P, SANGUISORBA. Burnet. 



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



7 iij ovate or roundish, deeply serrate ; spikes 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, jxavoS, 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 ; 

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

 — % Lvs. pimiately 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 1 — 3f 

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

 smooth beneath, IJ — 3' long, i as wide, sessile, termin'al one with a petiolule 



I 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. 



B. hirsuta. Torr. — Smaller and more hairy. 



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

 ■^dicels. 



2. A. PARVIFLORA. Ait. (A. suaveolens. Ph.) 



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

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

 incisea ; rac. spicate-virgate ; fls. small ; pet. longer than calyx ; fr. 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 |~ i', 

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

 balsamic odor. Aug. 



21. SPIRAEA. 



Ch'. airtipa, a cord or wreath ; the flowers are, or may be used in garlands. 



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

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

 1 — 10-seeded ; styles terminal. — %■ Unarmed shrubs or herbs. Branche.^ 

 and lvs. alternate. Fls. tchile or rose-color, never yellow. 

 22* 



