62 TWELFTH ANNUAL REPORT. 



THASPIUM, Nutt. Meadow-Pahsnip. 



T. barbiiiode, Nutt. Meadow-Parsnip. 



Blue Eirth river, Parry; Minneapolis, Roberts, Upliam; exten ling north to the 

 upper Mississippi river, Garrison. .Soiilli. 



T. aureuui, Nutt. Meadow-Parsnip. 



Common through the south half of the state ; extending north to the upper Mis- 

 sissippi river, Garr\son,M\A Sand Hill river, Upham; Pembina, Chlckeriiuj , Havard. 



T. aureuiii, Nutt., var. apteriim. Gray. Meadow-Parsnip. 



Minnesota river, Parry; abundant in Martin i-ounty, and in Emmet county, Iowa, 

 Cratty. Perhaps the more common form of the species. South. 



T. trifoliatiiiii, Gray. Meadow-Parsnip. 



Common through the south half of the state and northwestward ; extending north- 

 east to the upper Mississippi river, Garrison. 



T. trifoliatuni , Gray, var. apteruni, Gray. Meadow-Parsnip. 



Common throughout the Red river valley (the prevailing representative of this, 

 genu? north of Sand Hill river;, Upham; and common in Emmet county, Iowa, Cratty. 

 Probably the most frequent form of the species in this state. (The var. atropurpureum^ 

 Gray, doubtless also occurs here, but must be rare.) 



PIMPINELLA, L, Bornet Saxifrage. Golden Alexanders. 



P. iiitegerriuia, Benth. & Hook. (Ziziaintegerrima, DC.) Golden Alex- 

 anders. 

 Winona county, Holzinoer; lake Pepin, Miss Manning; Faribault, Miss Bcane; 

 Martin county (plentiful), Cratty; Red river valley near Moorhead, Leibery. Local. 



CICUTA, L. Water-Hemlock. 



C. maciilata, L. Spotted Cowbane. Musquash Root. Beaver-Poison. 



Common, or frequent, throughout the state ; abundant in the Red river valley. Th» 

 roots of this and the following species are deadly poison. 



C. virosa , L.* Water-Hemlock. Musquash-Poison. 



Pembina, Red river valley (-'this species exhibits forms running toward C. 

 maculata,") Chickering; frequent from the Red river westward, on wet spots on the 

 prairie, Macoun. Northwest. 



C. biilbifera, L. Bulb-bearing Water-Hemlock. 



Throughout the state ; common northward, infrequent southward. 



*CiC(JTA virosa, L. Root-fibres slender. Rootstock short, hollow, with trans- 

 verse partitions. Radical leaves bininnate; ultimate leaflets or segments strapshaped- 

 elliptical, entire or cleft, coarsely and unequally serrate. Stem erect, branched, hol- 

 low, 1 to 4 feet high. Lower leaves very large, triangular or lanceolate in outline, on 

 thick, hollow petioles, with the pinnaj again pinnate ; the secondarv pinnie undivided 

 or 2- or 3-cleft or partite or pinnatifid, l to 3 inches long, varying in breadth from 5^8 to 

 % inch ; stem-leaves much smaller and less compound. Umbels flat-topped, lax, 

 stalked, terminal or (from the growth of an axillary branch) opposite the leaves; rays 

 of the umbels 1 to 2 inches long ; pedicels '.j, to ^si inch long. Involucre none ; involu- 

 cel of numerous linear tapering leaves, shorter than the flowers. Flowers )« inch 

 across, white. Calyx-teeth ovate, much shorter than the petals, persistent. Petals 

 roundish-obovate, spreading, slightly notched, with a small inflexed lobe. Cremocarp 

 with the breadth greater than the length, which is one-tenth inch, reddish-brown, with 

 the vitta; apparent when dry ; ridges broad, little elevated ; styles long, reflexed.. 

 Sowerby's Enylish Botany, vol. iv. 



