RANUNCULACEy*:. (CROWFOOT FAMILY.) 39 



1. A. thalietroides, Spach. (Uue-Anemose.) Stem and slender pe- 

 tiole of iiuliial leaf (a s])au liii^li) rising from a cluster of thickened tuberous 

 roots; leaves 2-3-ternately compound; leaflets roundish, somewhat 3-lobed 

 at the end, cordate at tlie base, loug-petiolulate, those of the 2-3-leaved 1-2- 

 ternate involucre similar; flowers several in an umbel; sepals oval (^' long, 

 rarely pinkish), not early deciduous. (Thalictrum anemonoides, Alichx.) — 

 Woods, common, flowering in early spring with Anemone nemorosa, and 

 considerably resembling it. Karely the sepals are 3-lobed like the leaflets. 



5. THALICTRUM, Tourn. Meadow-Kle. 



Sepals 4-5, petal-like or greenish, usually caducous. I'etals none. Achenes 

 4 - 15, grooved or ribbed, or else inflated. Stigma unilateral. Seed suspended. 

 — Perennials, with alternate 2-3-ternately compound leaves, the divisions and 

 the leaflets stalked ; petioles dilated at base. Flowers in corymbs or panicles, 

 often polygamous or diacious. (Derivation obscure.) 



* Flowers dioecious or sometimes })oli/(/amous, in ample panicles; Jilaments slen- 



der; stigmas elongated, linear or subulate ; achenes sessile or s/iort-stipilate, 

 ovoid, pointed, strongly several-angled and grooved. 



1. T. dioicum, L. (Early Meadow-Kue.) Smooth and pale or glau- 

 cous, 1-2° high; leaves (2-3) all with general petioles; leaflets drooping, 

 rounded and 3 - 7-lobed ; flow^ers purplisli and greenish, dioecious ; the yel- 

 lowish anthers linear, mucronate, drooping on tine capillary filaments. — 

 llocky woods, etc. ; common. April, May. 



2. T. polygamum, Muhl. (Tall M.) Smooth, not glandular, 4-8° 

 high ; stem-leaves sessile ; leaflets rather firm, roundish to oblong, commonly 

 with mucronate lobes or tips,-,sometimes puberulent beneath; panicles very 

 compound ; flowers white, the fertile ones with some stamens ; anthers not 

 drooping, small, oblong, Idunt, the mostly wliite filaments decidedly thickened 

 upwards. (T. Cornuti, Man., not L.) — Wet meadows and along rivulets, N. 

 Eng. to Ohio and southward ; common. Jul^ - Sept. 



3. T. purpur^SCens, L. (Pl-rplish M.) Stem (2-4° high) usually 

 pur])lish ; stem-leaves sessile or nearly so ; leaflets more veiny and reticulated 

 beneath, with or without gland-tipped or glandless hairs or waxy atoms; 

 panicles compound ; flowers (sepals, filaments, etc.) greenish and purplish, 

 ditecious; anthers linear or oblong-linear, mucronulate, drooping on capillary 

 filaments occasionally broadened at the summit. — Dry uplands and rocky hills, 

 S. New Eng. to Minn., and soutliward. May, June. 



* * Flowers all perfect, corgmhed ; the filaments strongly club-shaped or inflated 

 under the small and short anther ; stigma short ; achenes gibbous, long-stipitate. 



4. T. clavatum, DC. Size and ap])earance of n. 1 ; leaves only twice 

 ternate ; flowers white, fewer; achenes 5-10, flat, somewhat crcscent-sliaj)ed, 

 tapering into the slender stijic. — Mountains oi Va. and soutliward. June. 



6. TRAUTVETTERIA, Fisch. & Mey. False Bugbane. 



Sepals 3-5, usually 4, concave, petal-like, very caducous. Petals none. 

 Achenes numerous, capitate, membranaceous, compressed-4-angled and in- 

 flated. Seed erect. — A perennial herb, with alternate palmately-l«»bed leaves, 

 and corymbose white flowers. (For Prof. Trautvetter, a Russian botanist.) 



