48 PROCEEDINGS OF THE AMERICAN ACADEMY 



hairs ; the terminal prickle weak. Subtending bracts spiny-ciliate, the 

 inner pas^sing into the involucral scales. 



C. CARLiNOiDES Schrank, var. Ajiericanus. — Rocky Mountains 

 of Colorado Territory, Hall and Harbour (no. 342), E. L. Greene; 

 Western jiart of California, Samuels, Bolander : forms with short and 

 broad scarious and lacerate appendages to most of the scales of the 

 involucre, tipped with an extremely short prickle, and few or no 

 prickly-fringed subtending bracts. Also, Mendocino Co., California, 

 Kellogg, a form with exterior involucral scales hardly at all appep- 

 daged, and the inner with rather small acuminate appendage, — possibly 

 a hybrid with C remotifoUus. This, or a form like it, appears to be 

 Cirsium scariosutn Nutt. in Trans. Amer. Phil. Soc. 1. c. p. 420, frona 

 the plains of the Rocky Mountains, — which was accidentally omitted 

 from the Flora of North America. 



II. Notes on BorraginacecB. 



Coldenia Linn. Upon a revision of the plants of this gi'oup, I am 

 the more convinced that the genus Coldenia should have the extension 

 which I proposed in Proc. Am. Acad. 5, p. 340, and should include 

 PlUocahjx Torr. also. And it is pleasant to note that a genus which 

 was dedicated to one of our worthies of the colonial period, has proved 

 to be mainly American, although founded on an Indian plant. The 

 section which I proposed, under the name of Tiqiiiliopsis, if strength- 

 ened on the one hand by a second species ( C Palmeri Gray, Proc. 

 Am. Acad. 8, p. 13G) as respects the corolline appendages, is invali- 

 dated on the other by the discovery that its embryo does not accord 

 with that of T. Nuttallii ; but it is still unlike that of Tiquilia. Mr. 

 Watson, in redescriliing the T. Palmeri (in Bot. King, p. 247), states 

 that the tube of the corolla is "• witliout scales at the base." There are 

 not, indeed, such free scales as those of T. Nuttallii, but in their stead 

 are much longer and salient plica?, reaching up to the insertion of the 

 slender filaments. The fruit, which Mr. Watson first made known, he 

 describes as of " a single obovate-globose smooth nutlet, attached at 

 the base, and without ventral sulcus." There are often two such 

 nutlets matured ; but the rounded scar is ventral, not basal, yet very 

 different from that of T. Nuttallii. Of albumen there is barely a trace. 

 The character •' cotyledons rounded, flat, entire, incumbent upon the 

 shorter radicle," is correct, except that they are rather hemispherical 

 than flat. This turning up of the rather long ra>dicle upon the back 



