62 TWELFTH ANNUAL REPORT. 



THASPIUM, Nutt. Meadow-Paksnip. 



T. barbiuode, Nutt. Meadow-Parsnip. 



Blue Earth river, Parry; Minneapolis, Roberts, Upham; e.xteuling north to the 

 upper Mississippi river, Gta»Tiso)i. South. 



T. aiireuni , Nutt. Meadow-Parsnip. 



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

 sissippi river, Garrison, and Sand Hill river, Upham; Pembina, Chickering, Havard, 



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



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

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



T . trifoliatiun. Gray. Meadow-Parsnip. 



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

 east to the upper Mississippi river, Garrison. 



T. trifoliatiun, Gray, var. apteriiin, Gray. Meadow-Parsnip. 



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

 germs 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. atropurpureuni, 

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



PIMPINELLA, L, Burnet Saxifrage. Golden Alexanders. 



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

 anders. 

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

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



CICUTA, L. Water-Hemlock. 



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



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

 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,") Chichering; frequent from the Red river westward, on wet spots on th& 

 prairie, Macoun. Northwest. 



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



Throughout the state ; common northward, infrequent southward. 



*CicuTA VIROSA, li. 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 pinnte again pinnate ; the secondary pinnie undivided 

 or 2- or 3-cleft or partite or pinnatifld, l to 3 inches long, varying in breadth from ^s 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 l to 2 inches long ; pedicels H to i*^ inch long. Involucre none ; involu- 

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

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

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

 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'8 English Botany, vol. iv. 



