PTEROCEPHALUS PARNASSI. 



like the loose spire of some small-flowered white Crucifer. This can 

 easily be grown in sheltered places and woodland soil, but must be 

 shielded from slugs. 



Pterocephalus Parnassi is a cushion plant, covered with pinky- 

 lilac Scabious flowers, on sterna of 2 or 3 inches all the later summer ; 

 it thrives well and grows wide in any open sunny place in light well- 

 drained soil. Pt. Pinardi is smaller, with the same silver-grey foliage 

 much more divided ; and the feathering becomes finer yet in Pt. pyre- 

 thn'folius from Kurdistan. Division and seed. 



Ptilotrichum contains some half-shrubby Crucifers left over from 

 Iberis, and some others which, if not white or pink, would be Alyssum. 

 They have, then, the same needs and values, will thrive in sumiy 

 places of the rock-garden, in light soil, profusely bloom in spring, and 

 set seed for their reproduction, if you do not prefer propagating them 

 from summer cuttings. 



Pt. cappadocicum appears also as lb. cappadocica in catalogues. It 

 comes from the alpine pastures of Armenia and Cappadocia, making 

 a neat small mass of stems, beset with huddled elliptic leaves, very 

 tiny and stiff and untoothed, smooth at the edge, and all clad in finest 

 starry down, getting narrower higher up the stems of 3 niches or so, 

 that each end in a firm head of white candytuft. So that the whole 

 thing is a rounded hump of simultaneous bloom. 



Pt. cydocarpum (Alyssum) suggests Alyssum rupestre, but the 

 leaves are broader, and the pod scaly ; it forms a neat tufty mass of 

 branches, thick at the base, with little narrow silver-scaled leaves 

 that tail off into upstanding naked spires of white blossom, 6 inches to 

 a foot high. 



Pt. emarginatum has no merit. 



Pt. glabrescens makes a neat humped dome about 6 inches tall, 

 almost hairless, with the branches thick with fat narrow foliage, and 

 ending in spikes of white flower. (Masmeneudagh in Cappadocia.) 

 Akin to Pt. spinosum, which comes from Spam. 



Pt. longicaule is a depressed heap, forming loose silver rosettes, 

 and with flopping boughs of a foot or two in length, with bare and quite 

 frail stems canning showers of white blossom — the whole effect being 

 that of a white-flowering Alyssum saxatile in habit. (From the lime- 

 stone crevices of Granada. &c.) 



Pt. purpnreum is one of the loveliest Crucifers anywhere known, 

 and sometimes is called Alyssum Lagascae. In the upmost schists of 

 the Siena Nevada, from 8000 to 11,000 feet, it huddles itself among 

 the rocks almost into hiding, growing a very dense thornless and 

 branching tidy mass of close-congested silver-scaled leaves, oblong- 



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