APPENDIX. 



P. radicala is a dwarf high-alpine from Chitral, in the group of P. rosea, 

 with brilliant blossoms, each sitting solitary in rosettes of very thick leathery 

 foliage. 



P. Reginella is rny only new Primula, except P. Farreriana, of 1915. In point 

 of fact P. Reginella has several times been collected before, but now only for the 

 first time (by my specimens) made capable of separate recognition. It is an 

 exquisitely lovely minute gem of the very highest grassy aretes only in the 

 Da-Tung chain, very local indeed, but occasionally sprinkling the sere pale 

 turf at 14,000 feet with the sparks of its tiny flowers of richest rose with a 

 golden eye, springing close by twos and threes, from the microscopic tufts 

 of glossy emerald leaves that lurk in the lawns and under the little ridges 

 of the fell-slope. P. Reginella stands almost undistinguishably close to P. 

 tibetica, but is always quite powderless and lucent, whereas P. tibetica (Watt 

 notwithstanding) is invariably mealy (they say), particularly in the young foliage. 

 P. Reginella, in point of fact, distinct and exquisite little queen of loveliness though 

 it is, has suffered much from confusions. Particularly interesting is its con- 

 fusion with P. pumilio, for which at first I took it, expecting to find it pumilio, 

 and nothing else. P. pumilio rests on one sheet of specimens in the Petrograd 

 Herbarium, and on that page are arranged 4 dense rectangular patches of 

 specimens. Of these the first alone represents the real P. pumilio, a squatty 

 tuffet, with a stalk, however short, and a head of flowers ; the second and third 

 samples consist almost wholly of P. Reginella, and the last entirely so. In 

 the same Herbarium P. Reginella may also be found lurking under P. 

 diantha and P. sibirica. In sum, it suggests a wee dwarf form of my bril- 

 liantly rosy sibirica cousin F 507, and will be a treasure of delight in cool 

 finest turf, or in specially choice safeguarded corners of the underground- 

 watered bed. 



P. rhodantha is a rare plant, in the immediate group of P. rosea, but dis- 

 tinguished by stalked leaves, a stem hardly longer than they, and the slender 

 footstalks of the flowers themselves. It is a distinct species, formerly reckoned 

 a mere variety of P. rosea. 



P. riparia I found on beck banks about Chago, on the Tibetan Alps, in 1914. 

 It is a worthless little squinny-flowered thing in the aggregate of P. neurocalyx, 

 and in appearance suggesting a starveling of P. obconica. 



P. rosi flora lurks in the shadow of P. elegans and P. rosea, but here there 

 is hardly any stem at all, and the flowers have each a long footstalk and a 

 lobed central ring. 



P. rupicola is still obscure, but seems near P. Souliei, and bears up its heads 

 of golden-eyed rosy flowers on 3-inch stems on the boulders and open stony 

 pastures of Yunnan. 



P. sciaphila connects P. bella and P. indobella. It is very rare, only one 

 sample having been so far seen, a massive patch in dank shade of mossy granite 

 cliffs in Upper Burma. It is larger than the similar P. coryphaea, with darkish 

 purple flowers over the carpet, which suggests that specially neat mat form of 

 P. bella which is differentiated as P. nano-bella. 



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