52 PROCEEDINGS OF THE AMERICAN ACADEMY 



lished in Silliman's Journal in the year 1862. They mainly relate to 

 the various plants which I had referred to M. alpiiia, of which I had 

 formed a hetei'ogeneous assemblaije. Mr. Watson discerned this, and, 

 in the Botany of King's Exploration, distinguished M. hrevistyla, but 

 without noticing that he had under that name the original M. alpina, 

 founded on James's plant of Long's Expedition. 31. alpina differs, I 

 find, from all the rest, in having extremely short and not broad fila- 

 ments, and also an included style. In James's plant, as in Mr. Wat- 

 son's, the stamens are inserted on the middle of the tube of the corolla, 

 and the style hardly surpasses the base of the included anthers. There 

 is another form, as I must regard it, differing only in the insertion of 

 the anthers on the throat, and a correspondingly longer style, which 

 brings the stigma up to the level of the orifice of the tube, — a dimor- 

 phism the reason and operation of which I do not understand ; but 

 something similar occurs in other Borraginacece, such as Amsinckia. 

 The specimens with enlarged filaments, as long as the anthers or 

 longer, and with long capillary exserted style, which I had confounded 

 with M. alpina, prove to be the Pulmonaria lanceolata of Pursh and 

 P. marginata Nutt. ; and to it I refer M. Fendleri, in which all degrees 

 between a deeply o-parted and a barely o-cleft calyx occur, varying 

 even in the same individual. As to M. Drummondii, which I had 

 referi-ed to M. alpina, and Hooker to M. Vlrginica, I now regard it as 

 an arctic form of M. Sibirica. The little folds in the throat of the 

 corolla, which I formerly tailed to see, are evident in original speci- 

 mens in Dr. Torrey's herbarium. The species may be rearranged 

 as subjoined.* 



* MERTENSIiE Boreali-Americanae. 



§ 1. Stenhammaria. (Sleenhammera'ReKhenh.) Nuciilae magis carnosae demum 

 utriculatae, laevissimjfi, aciitse : corolla brevis. 



1. M. MARiTiMA Don. Araphigaea. 



§ 2. EuMERTENSiA. Nuculse opaeae, plus minus rugosae vel scabridee, obtusae. 



* Corolla tubaeforrnis, priplonga, limbo subintegro, plicis faucialibus obsoletis : 

 filamenta gracilia elongata : discus hypogynus in lobos 2 lis ovarii adaequantes 

 productus. — Meitensiu Roth. 



2. M. ViRGiNiCA DC. M. pidmonarioides'Roth. America boreali-orientalis. 

 « * Corolla limbo snbcampanulato 5-lobo, plicis faucialibus manifestis. 



+- Filamenta anthera aequilata et breviora vel parum longiora, fauci semper in- 

 serta : stylus capiliaris e fauce nunc ultra limbum exsertus. 



