1914-15.] BOTANICAL SOCIETY OF EDINBURGH 315 



margin varying undulate through crenate to 

 acutely lobed, always more or less denticulate, the 

 petiole usually longer — even twice as long as, — 

 sometimes shorter than the lamina. 



Clothing of foliage. — Petioles densely villous with 

 brown articulate hairs varying to quite glabrous. 

 Lamina the upper surface pubescent in the adult 

 state to quite glabrous ; the lower surface always 

 paler and varying from pubescent with veins 

 clothed with long hairs to entirely glabrous. 

 Margin varying from ciliate to naked. 



Scope. — As much as three times the length of the 

 foliage or very much shorter and entirely immersed 

 in it. Villous, pubescent, or glabrous. 



Bracts. — Small linear short or large leafy and forming 

 an involucre. Villous, pubescent, or glabrous. 



Umbel. — Eight-flowered, to two-flowered, always with 

 the flowers opening successively and showing 

 unequal pedicels. 



Pedicels. — As much as 2 cm. long, sometimes almost 

 absent. Stout to filiform. Strict or deflexed 

 Villous, pubescent, or glabrous. 



Floiver. 1 — Size variable. 



Calyx. — Campanulate to cup-shaped. Usually much 

 shorter than the corolla-tube, sometimes lono-er. 

 Barbate, pubescent, or glabrous. Lobes triangular 

 mucronulate, or represented by little more than a 

 slight undulation of the calyx-tube, or broad and 

 denticulate. 



Corolla-tube. — Wide or narrow. Sometimes three 

 times the length of, at other times not so long 

 as the calyx. Annulate or exannulate. Pubescent 

 or glabrous. 



Corolla-limb. — Limb large with broad lobes, or small 

 with narrow lobes. 



Androecium. — There are evident variations in relative 

 position of insertion of stamens and length of 



1 I may note here that dried material in the herbarium is an unsafe 

 index to the flower size in some species of primula. In P. membrani- 

 folia, F ranch., for example, the flower at first expansion is small, though 

 ready for pollination, and it gradually enlarges and reaches full size 

 several days afterwards, when it is three times its original dimensions. 



