Fhe Scottish Naturalist. 269 



Gardiner says the upper part of Glen Cally has been searched, but 

 it is more likely to occur in the lower portion of the glen by the 

 stream than among the rocks at the head. 



Triticum bifiorum Brig. T. caninutn var. bifiorum Mitten. T. 

 'alpinum Don mss. 



Prov. 15, Ben Lawers, Perth; Don in Borrer's Herb. 



Ambiguity, Cyb. iii., 237 ; Lond. Jour. Bot., viii., 533. Gomp. 

 Cyb. Br., 597. 



Hooker says, " This is only T. repens" Stud. Ft. 



" The present is one of those plants gathered by the late Mr. 

 G. Don, which appears to have been overlooked by other botanists. 

 This label in Mr. Borrer's herbarium runs thus : ' Triticum 

 alpinum nova spec, it differs from caninum by its short arista and 

 upright spikes, and from repens by not running at the roots.' No 

 date is mentioned. It is thus clearly evident that he distinguished 

 it as a new species. The only British species with which it can 

 be confounded is T. caninum, from which it may be distinguished 

 by its leaves smooth on both sides, its usually two-flowered spike- 

 lets, and its want of the long awn ; it also appears "to be a more 

 slender plant, with narrower leaves." Mr. Mitten in Jourri. Bot. 



viii. 533- 



The locality indicated is " Rocks on Ben Lawers." Arnott and 

 Babington place Don's plant as a variety of T. caninum. A 

 specimen of this is preserved in Don's collection of grasses " from 

 Ben Lawers. Nyman gives as its range as Lapp, occ, Suec. bor., 

 Norv. Alp. T. violaceum Horn ; Exs. Fr. v. 99." T. alpinum — 

 Don (Scot.) 



The foregoing list of 'reputed discoveries ' may be divided into — 



First — The plants which Don almost certainly found in their 

 recorded localities, but which were only casual plants introduced 

 with seed corn or other means. Of these are Rapistrum orientale 

 D.C. ; Neslia paniculata Desv. ; Hypericum barbatum Jacq. ; 

 ( 'hcerophyllum aromaticum L. ; Galium saccharatum All. ; Galium 

 cinereum Sm. ; Galium spurium L. ; Friticum cristatum Schreb., 

 and probably Salix Doniana. 



Secondly — Plants which have since been found by others in 

 Britain, including Lychnis alpina L. ; Caltha radicans Forst. ; 

 Alchemilla conjuncta, Bab. (argentea, Don) ; Hierochloe borealis, 

 an&Juncus tenuis, the two latter not in Don's district. 



Fhirdly — Plants which probably Don really discovered, and 

 which may yet be found when sought at the pioper season, viz. : 

 Sag ma alpina, Juncus tenuis, Car ex ustulata, and Hierochloe borealis. 



