130 



FIELD COLUMBIAN MUSEUM BOTANY, VOL. 2. 



gan at Sault St. Marie, Pitcher; Lake Michigan strand at Chicago, 

 Illinois, Pammel, Laming, Millspaugh; Berkeley, California, (intro- 

 duced) Greene, Jepson. (Fayal, Azores, C. S. Brown 8.) 



turbinate, with a slightly lipped 



Cakile Alacranensis sp. nov. 



C. maritima on p. 43. 



Silique very turgid, 1.6 cm. 

 horizontal articulation. Upper, 

 joint conoidal, very thick walled, 

 2-grooved, i.i cm. long, orbicu- 

 lar in section, the apex straight 

 pointed; seed 3.1 x 1.8 mm., 

 pinkish tinged with yellow, the 

 surfaces dotted with brownish 

 punctae, cotyledons strongly de- 

 marked. Lower joint fertile, 

 infundibuliform, but little more 

 than a swelling of the pedicel, 

 thin walled, ovate in section, 6 

 mm. long; seed 3.5 x 1.3 mm, cylindrical, well developed, usually 

 more thickly punctate than that of the upper joint. 



Plants large and spreading, thick-stemmed, bushy-branching, 

 20-40 cm. high. Racemes 15-25 cm. long, densely fruited. Leaves 

 yellowish-green, spatulate-lanceolate, tapering to a partly clasping 

 petiolar base; entire, or rarely slightly crenate or crenate-dentate at 

 the apex, 3-7 cm. long, .8-2.1 cm. broad. 



Habitat: Strand of Perez and Pajaros Islands, Alacran Shoals, 

 Gulf of Mexico, Millspaugh 1744, 1764, 1767 (see note concerning 

 these numbers on p. 43, comparing the living appearance of this 

 species with that of C. aequalis which grows upon Chico and Allison 

 Islands of these shoals). 



(There is a sheet in herb. Gray, Cambridge, upon which is a leaf 

 and a portion of the inflorescence of C. fusiformis Greene, collected 

 at Key West, Florida, by Mr. Binney; associated with these is a 

 large packet of fruits of C. fusiformis, mixed with a still greater 

 number of upper joints of C. Alacranensis. Although there are no 

 formed fruits on the raceme of the flowering specimen attached to 

 this sheet, yet those in the packet are fully ripe. From whence 

 these mixed fruits came it is impossible to state.) 



Cakile Alacranensis x aequalis hyb. nov. 



A specimen collected on the strand at Palm Beach, Florida, by 

 Mr. H. J. Webber in 1895, No. 243 in herb. Mo. Bot. Garden, appears 

 to be a cross between these species, a highly possible result, as the 

 fruit of C. Alacranensis could reach that locality on the current of 

 the Gulf Stream which sweeps the shores of the Alacrans on its way 

 to the Florida keys. 



Cakile Chapmanii sp. nov. 

 C. maritima cequalis Chapm. 

 Silique turgid, 2 cm. long, 



the articulation nearly horizontal. 



