70 



margins of the wings and with a costa of the type found in 

 M. grandiflora. These species are M. comata Steph. (of New 

 Caledonia); M. glaherrima Steph. (of Chile, Patagonia, New 

 Zealand and Australia), and M. sinuata Loitles. (of Peru). The 

 first and third of these are known to the writer from description 

 only. In M. comata the plants are epiphyllous, the thallus is 

 plane, and the cells of the wings are unusually large, measuring 

 126 X 54 M according to the description. In M. glaherrima the 

 thallus is plane and is often naked throughout, even marginal 

 hairs being absent; the female branch, moreover, bears surface 

 hairs, as is usual in the genus. In M. sinuata, which is known 

 only from the original material, the thallus is strongly convex 

 as in M. grandiflora, but the wings are often thirty-five cells 

 wide, the hairs are 150 ^i long, and the margin is described as 

 being deeply sinuate or, rather, interruptedly recurved, a con- 

 dition which is apparently never duplicated by M. grandiflora. 

 Unfortunately M. sinuata was described from sterile material, 

 and there may be difficulty in recognizing it again. 



Sheffield Scientific School, 

 Yale University 



SHORTER NOTES. ' 



A New Phacelia from Colorado. — ^Phacelia denticulata 

 sp. nov. Annual, the stem one to three dm. or more high, 

 sometimes branching from near the base, pubescent and some- 

 what viscid-glandular; the leaves broadly linear in outline, five 

 to six cm. long including the petiole, one and one half to two cm. 

 wide, the small plants having smaller leaves, the lower part 

 divided, the upper part pinnatifid, hispid pubescent on both 

 surfaces; the inflorescense scorpoid and of several branches on 

 the larger plants, the longer ones becoming four to six cm. long 

 in fruit; the calyx lobes linear, obtuse, hispid and minutely glan- 

 dular; the corolla blue or bluish, about five mm. long, the lobes 

 denticulate, the stamens and style included; the seed capsule 

 becoming five or six mm. long, equaled by the calyx lobes, four 

 seeded, the seeds oblong, four mm. long, and lightly faveolate. 



Phacelia denticulata belongs with P. glandulosa Nutt. and 

 P. Neo-Mexicana Thurber; the leaves are like those of the former, 

 but the flowers are nearer those of the latter. Dr. Gray, in the 



