OF ARTS AND SCIENCES. 53 



Amsinckia Lehm. Dr. Torrey, in Bot. Mex. Boundary and in 

 Bot. Whipple's Expedition, has justly remarked that the insertion of 

 the stamens and the length of the style differs reciprocally in different 

 individuals of the species. But, as in Lithosperinum, the tendency is 

 not completely carried out. It is here most marked in A. spectahilis. 

 But in one specimen of it, and also in one of A. lycopsoides, along with 

 very low stamens the style was still shorter. In these, and in the low- 

 stamened and long-styled form of A. spectahilis, only have I found 

 minute hairy tufts in the throat, in the place of the crests of the allied 

 genera ; and their place is marked externally by a slight intrusion, 

 showing that tliey answer to pliciB. No trace of them is discerned 

 when the stamens are borne in the throat or high up in the tube. 

 The "plicis intrusis" by which the glabrous throat of the corolla of 

 A. spectahilis is " semiclausa," according to Fischer and Meyer's origi- 

 nal character, are the longitudinally plicate sinuses, wliich are consider- 

 ably infolded, at least in the bud. While reducing three of the species 



++ Corolla tubo calyce limboque suo 2-3-plo longiore. 



3. M. OBLONG iFOLi A Don. Pidmonaria oUongifolia Nutt. 



*+ -^ Corolla tubo limbo suo parum vel sesquilongiore. 



4. M. SiBiRiCA Don ; Gray in Sill. Jour. 34, p. 341. 



Van Drommondii : forma alpina, spithamaja; foliis oblongis sessilibus vix 

 wltrapoUicaribus fere aveniis margiiie obsolete denticulato-ciliolatis ; corollas (Im. 

 5 longae) tubo quam limbus vix parumve longiore calycis lobis ovato-oblongis 

 subduplo longiore. — Lithospermum Drummondii Lebm. Mcrtensia Dfummondii 

 Don. Arctic sea-coast, Richardson, ex Hook. (Vide supra.) 



5. M. PANiccLATA Don ; Gray, 1. c. 



6. M. L.\xCEOLATA DC. cum syn. cit. M. aJpina pro parte, Gray, 1. c. Tbat 

 this plant is Pursh's P. lavceolata and Nuttall's P. marginata, I learn from the 

 original specimens of both, whicli have somehow foimd their wi\y (I believe 

 through Prof. Tuckerman's purcliase) from Lambert's herbarium to that of the 

 Academy of Natural Sciences, Philadelphia. 



Var. Fendleri, forma calyce tantum 5-fldo. — M. Fendlcri Gray, L c. 



t- -t- Filamenta brevissima, baud dilatata, aut fauci aut tubo inserta : stylus 

 inclusus. 



7. M. ALPiXA Don, Gray, I.e. pro parte. [Pulmonarin alpina Torr.) M. bre- 

 ristyla Watson, Bot. King, p. 339, t. 23, fig. 112, forma antheris tubo medio 

 insertis inclusis, stylo brevi. — As I noticed in the Revision of the genus, this 

 species is dimorphous in an unusual way, the flowers with the higher stamens 

 inserted at the throat having the lonr/er style, which brings the stigma up to the 

 throat ; and those with low and included stamens have a still shorter style, with 

 the stigma only a little higher than the base of the anthers ! 



