434 EANUNCULACEAE 



4. Delphinium macrocerktills Rydb. Plants more or less pubescent with grayish 

 hairs. Steins slender, 3-5 din. tall, mostly simple : leaves few ; blades 3-6 cm. broad, 

 parted into 3-5 segments, these 2-3-cleft : racemes simple, many-flowered : pedicels erect, 

 about 1 cm. long, the linear bractlets 2-4 mn>. below the calyx : sepals white or the lower 

 ones with a bluish spot, oblong, fully twice as long as the upper petals : spur slightly 

 S-sliaped, bluisli, about thrice as long as the obliquely pointed upper petals : lateral petals 

 much longer than the upper, bearded, 2-cleft : fruit unknown. 



On prairies, Tom Greene County, Texas. Summer. 



5. Delphinium virescena Nutt. Plants somewhat pubescent. Stems erect, stout, 

 2-3 dm. tall : leaves few ; blades 2.5-3 cm. broad, usually 3-5-cleft or 3-5-parted : racemes 

 few-flowered, simple : flowers greenish white : sepals oblong or nearly so : spur longer than 

 the petals, nearly straight : petals various, the 2 lateral bearded, with a small appendage 

 at the base of each claw, the 2 upper much smaller, concave : fruit not seen. 



On plains. North Carolina, Georgia and Arkansas. Summer. 



6. Delphinium Caroliniknum Walt. Plants slender, pubescent. Stems 3-6 dm. 

 tall : leaf-blades deeply cleft into linear toothed or cleft segments : racemes terminal, 

 10-20 cm. long : flowers pedicelled, deep blue, rarely varying to white, about 2.5 cm. long, 

 the spur slightly curved upward, usually horizontal, 15 mm. long : follicles 3, erect or 

 slightly spreading, downy, 14-18 mm. long, each tipped with a subulate beak : seeds 1.5 

 mm. long, wing-margined, the faces slightly squamellate. [D. azureum Michx.] 



On prairies and in open grounds, Virginia to Arkansas, Florida and Texas. Spring and summer. 



7. Delphinium vimineum D. Don. Plants minutely pubescent. Stems erect, 5-7 

 dm. tall, simple : leaves several ; blades 3-parted ; segments entire, or mostly incised or 

 cleft, the lateral ones more so than the middle ones, the ultimate segments acute : racemes 

 elongated, few-flowered, interrupted : sepals deep blue, oblong or nearly so, 12-18 mm. 

 long, somewhat crisped, obtuse : spur shorter than tlie sepals : fruit not seen. 



On prairies, Texas. Spring. 



8. Delphinium urceolktum Jacq. Plants glabrous or sparingly hairy below, 

 densely pubescent above. Stems slender, 0.5-2 m. tall : leaves large, all but the upper 

 with petioles ; blades deeply 3-5-cleft. the divisions lanceolate or oblanceolate, cuneate, 

 acuminate, cleft and toothed toward the apex, the upper ones reducedto linear or lanceo- 

 late bracts subtending the flowers: racemes dense, elongated, sometimes over 3 dm. in 

 length: lower pedicels about 2.5 cm. long: flowers purple or blue, 16-20 mm. long, 

 downy-pubescent : spur nearly straight, 8 mm. long : follicles 3, erect, 8-10 mm. long, 

 pubescent, each tipped with a subulate beak. [D. exaltatwn Ait.] 



In woods, Pennsylvania to Minnesota, North Carolina, Alabama and Nebraska. Summer. 



9. Delphinium tricdme Michx. Plants glabrous or pubescent, the roots tuberous. 

 Stems stout, simple, 3-9 dm. tall : leaves with slender petioles ; blades deeply 3-7-cleft or 

 divided, the divisions linear or obovate, obtuse, entire, or again cleft and toothed : raceme 

 loose, 10-15 cm. long, mostly several-flowered : flowers 2.5-3.5 cm. long, blue or white : 

 spur generally slightly bent, ascending, 2-3 cm. long : follicles 3, widely spreading, 10- 

 12 mm. long, each tipped witli a short beak: seed-coat smooth, dark. 



In woods and thickets, Pennsylvania to Minnesota, and in the mountains to Georgia, and Arkansas. 

 Spring. 



11. ACONITUM L. 



Perennial herbs, with elongated erect ascending or trailing stems and poisonous roots. 



Leaves alternate : blades palmately lobed or divided. Flowers large, irregular, showy. 



Sepals 5, the posterior (upper) one larger, hooded or lielmet-shaped. Petals 2-5, small, 



the 2 superior ones hooded, clawed, concealed in the helmet, the 3 posterior ones, when 



present, minute. Stamens numerous. Carpels 3-5, sessile, many-ovuled, forming follicles 



at maturity. 



Flowers blue or purplish : hood helmet-shaped. 1- ^. uncinatum. 



Flowers white or yellowish : hood oblong-oonic. 2. A. reclinatum . 



1. Aconltum uncinatum L. Stems slender, weak, 6-12 dm. long, ascending or 

 climbing, leafy : leaf-blades thick, broader than long, 7-10 cm. wide, deeply 3-5-lobed or 

 cleft, the lobes oblong or ovate-lanceolate, cleft or toothed, acute, glabrous or nearly so : pan- 

 icle few-flowered, pubescent, the fU)wers clustered at the ends of its branches, blue or purplish, 

 2.5 cm. broad or more : hood erect, obtusely conic, acule in front but scarcely beaked : 

 follicles 12-14 mm. long, sulnilate-beaked. 



In woods, southern Pennsylvania and chiefly along the mountains to Georgia. Also in Wisconsin. 

 Summer and fall. Wild Monkshood. 



