./Etiiusa. I'MHELLlFERiE. tiiy 



1. CE. sarmcntosa (Nutt. ! mss.) : " root fibrous; stem weak, stolonir»roiis ; 

 leaves bipiniiately dividod ; segments ovate, acute; ineisely si-rratc ; ilic 

 lower and terminal ones often 8-cleft ; umbels terminal, and (ipprisite the 

 leaves, many-rayed; involucre none or fow-Uavcd ; fruit cylindrical-ob- 

 long; styles long and somewhat diverging. — j'licllandrium a(|uaticum, 

 Pursh,Ji. 1. p. 195? excl. syn. 



" Ponds and inundated places, Oregon, abmidant.— Tiie stalks when young 

 are eaten raw by the Indians, and liave a i;(K)d deal the taste of Celery." 

 NitttalL. — Fruit about 2 lines long, somewhat corky; Commissure with 2 

 vitta;. Styles nearly as long as the carpels. Styloptidium small, conical. 



19. CYNOSCIADIUM. DC viem. Umh. j). 44, /. 11, S^-jnodr. 4. Jb. 160. 



Calyx-teeth subulate, persistent. Petals ovate or nearly orbicular, entire, 

 with a short inflexed point. Styldpodiurhi conical. Styles very short, re- 

 curved. Fruit ovate. Carpels with 5 thick obtuse ribs, of whicii the lateral 

 ones are united with a thick corky accessory border. Intervals witli single 

 vittie. Commissure with 2 \ittaj. Seed tcrelely convex on the back, rather 

 flat on the face. Carpophore free, 2-parted. — Glabrous (North American) 

 annuals, with angular stems. Cauline leaves pinnately or palmately divid- 

 ed ; the segments linear or linear-lanceolate : radical leaves undivided. 

 Involucre aud involucels few-leaved. Flowers white. 



'^ 1. C. digitatum (DC): lower leaves digitately 6-parted ; upper one.4 

 3-parted ; petals ovate, with an inflexed point ; fruit contracted into a nbek 

 near the summit ; dorsal ribs very prominent. — DC. ! man. I. c. t. 11, f. A, 

 Sf])rodr. 4. p. 141. 



Borders of ponds, and wet prairies, Arkansas, Nuttali ! Louisiana, Dr. 

 Hale! Prof. Carpenter! Texas, Dr. Leavenworth! May-.lune. — Stem 

 1-2 feet high, slender, somewhat branching above. Radical leaves often 

 entire, and narrowly lanceolate. Umbels G-lO-rayed. Involucre of 5-6 

 linear leaflets. Fruit about 2i lines long; the accessory margin very con- 

 spicuous. Intervals deep and narrow. 



— 2. C. jnnnatum {jyC): leaves pinnately divided; segments 2-."3 pairs; 

 distant ; the terminal one very long ; petals nearly orbicular, obtuse ; fruit 

 dvate-oblong ; the ribs slightly elevated. — DC. ! I. c. t. 11, /. B, &(■ prodr. 

 A. p. 141. 



Wet prairies, Arkansas, Nuttali ! Dr. Pitcher ! Dr. Leavenworth ! Texas, 

 Drummond ! — Radical leaves often entire, or with 1-2 small pairs of seg- 

 ments. Flowers larger than in the preceding species. Fruit not attenuated 

 at the sununit ; the ribs convex, with shallow intervals. 



20. ^THUSA. Linn.; Koch, Umh. p. Ill ; DC. prodr. 4. p. 141. 



Calyx-teeth obsolete. Petals obovate, emarginate, with an inflexed point. 

 Fruit ovate-globose. Carpels witli 5 acutely cju-inaled ribs ; the lateral ones 

 marginal and a little broader. Intervals deeply acute-angled, witli single 

 vittse. Commissure with 2 vitta;. Seed teretely-convex an the back, rather 

 flat on the face. Carpophore 2-parted. — Annual erect poisonous herbs-- 

 Leaves many-cleft. Involucre none, or 1-leaved. Involucels 1-3-5-leaved; 



lateral, spreading or pendulous. Flowers white. 



78 



