238 THE JOURNAL OF EOT AN r 



specimens of P. longifoUa tend to lose the spreading leaves and to 

 have them erect ; even then they match Kerner's ligure of the fruiting 

 stems. 



The unequal length of the setae appears to require more investi- 

 gation. Young ones are naturally shorter: setie are never all equal in 

 lentHh in any sjjecimens I have examined. But they are detinitely 

 all setit, the indumentum in all three being very distinct from that of 

 P. saccharafa which should have been excluded by Kernerfrom his 

 ^Sfn'(/osae. The inii)ortance of the glandular hairs appears to have 

 been magnified. In diying, these adhere to the leaf and are indis- 

 tinguishable except with a fairly high-powered binocular dissecting 

 microsco})e. They are then easily seen, and all the s])ecimens of 

 P. azurea I have seen possess them. They appear exactly similar 

 on the leaves of P. azurea and P. longifoUa. Absence of fresh 

 material has prevented comparative investigation of them on the 

 inflorescences, and in the dry they do not appear to agree with 

 Kerner's remarks. In the foregoing characters given by Kerner, the 

 variation would seem to have been given a pi-ecision which the facts 

 do not warrant ; but more observation in the field in respect of them 

 is required before their true value can be known. Kerner grew his 

 si)ecies in the garden, a method which must tend to give undue 

 emphasis to characters of the particular individuals grown as opposed 

 to the true specific characters. 



In the shape of the corolla our plant exactly agrees with Kerner's 

 figure of P. longifoUa. The hairs on the tube of the corolla 

 appeared at first to be an unsound character, completely variable in 

 degree from considerable to almost nothing. But when the tubes of 

 fresh fiowers of Miss Jekyll's P. azurea and the Xew Forest jDlant 

 had been seen, a real distinction seemed possible. In these, the hairs 

 formed a nearl}' straight circle all round the tube. In the others the 

 hairs are more in five curved groups, witli their edges continued down 

 the veins. But this character requires to be tested to determine the 

 limits of variation in each. 



It is possible that there are more forms (local races ?) than have 

 yet been recognised ; it is on the other hand equally ])ossible that 

 there are fewer forms with greater variabilit3\ But as they are at 

 present understood it seems evident that our plant is not P. azurea. 



P. longifoUa from abroad is unconmion in British Hei-baria, but 

 what material there is seems to be exactly the same as our Hampshire 

 plant. Its synonym}^ etc. is as follows : — 



P. LONGIFOLIA Boreau [! in Herb. Mus. Brit.], Fl. Centr. Fr., ed. 3. 

 ii. 400 (1857) ; Martr.-Don., Fl. Tarn, 4S7 (1864) ; Dumortier in 

 Bull. Soc. Bot. Belg. iv. 32 (1S68) ; emend. \jf. Kerner, pp. 15-10] 

 Kerner, Mon. Pulmon., 13 (1878) ; Rouy, Fl. France, x. 295 (1908) ; 

 " P. angustifoUa 't b. P. longifoUa " Bast., F\. Maine et Loire, Suppl., 

 44 (1812) ex loc. class., fide Kerner, 1. c. 



P. angustifoUa auct. angl., non L. emend. Kerner. 



F. azurea Williams, Prodr. Fl. Brit, i, 251 (1909), non Besser 

 (! in Herb. Mus. Brit. & Herb. Kew). 



P. tuberosa Gren. etGodr., Fl. Fr., ii. 520 ( lS52)et Willk. et Lange, 

 Prodr. Fl. Hisp., ii. 498 (1870), partim, quoad plant, fol. maculat. 



Icones : — Kerner, op. cit. t. 2. (bona) ; Fng. Bot. t. 1028. 



