OF ARTS AND SCIENCES. 415 



small, setosely toothed : cymes bracteate, few-flowered, glabrous ; 

 flowers white, on slender bibracteolate pedicels, the perianth-segments 

 (4 in the male, 5 in the female flowers) 3 or 4 lines long : capsule 4 

 or 5 lines long, with one broad truncate wing. Barranca, among 

 shady rocks. (143.) 



Eryngium Carlin^, Delar. Guadalajara, very common ; Sep- 

 tember. (458.) — " Yerba del zapo"; used as an abortifacient. 



P^RYNGiuir CYMOSUM, Delar. ? Often 5 feet high, the radical leaves 

 2 feet long by 4 or 5 lines broad, the rigid spinose teeth (4 to 9 lines 

 long) usually with a slender tooth at the base : involucral bracts (8 to 

 12) very rigid and spinose, 1 or 2 inches long, entire ; floral bract 

 strongly 3-nerved, two of the nerves marginal, equalling the white 

 flowers. Rio Blanco, in grassy ravines ; October. (681.) 



Arracacia decumbens, Benth. & Hook. Rio Blanco, in moist 

 bottoms; June. (51.) — An examination of the material at hand 

 has brought me unwillingly to the conclusion adopted by Bentham & 

 Hooker, that this genus should be considered a polymorphous one, 

 embracing Pentacrypta, Velcea, and Dewerja. EaJophus, moreover, 

 appears to be separated only by its smaller obsoletely ribbed fruit with 

 numerous irregular vitta?. I perceive no combination of characters — 

 blunt or attenuate fruit, prominent or depressed stylophore, entire or 

 bifid or divided carpophore, more or less thickened ribs, vittae solitary 

 or several in the intervals, a terete and involute seed or sulcate be- 

 tween the ribs and deeply channelled on the face, together with dif- 

 ferences of habit — by which the species can be very satisfactorily 

 grouped into two or three genera. The more recent species of Dew- 

 eya (D. Kellof/yii, D. Hartwegi, and D. vcstlta) should therefore be 

 referred, with the original D. argula, to Arrnracia. 



EuLOPHus PEUCEDANOiDES, Benth. & Hook. Rio Blanco, on 

 moist hillsides ; June. (40.) 



Aptum leptophyllum, F. Muell. Barranca, in moist shade. (94.) 



CicuTA (?) LiNEARiFOLiA. Stem stoiit, fistulous, 10 feet high, 

 glabrous: leaves large, sessile upon a dilated sheathing base, twice 

 ternate and quinate (uppermost simply ternate), the divisions linear, 

 3 to 6 inches long, simple or hastately lobed at base, acute and acutely 

 serrate : peduncles somewhat in threes ; involucres and involucels of 

 several linear long-acuminate bracts ; rays about 20, an inch long or 

 more; pedicels short: flowers "brick-red": immature fruit oblong- 

 ovate, with thickened ribs, depressed stylopodium, and somewhat 

 dorsally compressed sepd. Guadalajara, on a hilltop among shrubs ; 

 August. (275.) — Fruit too immature for more than a conjecture 



