in Organic and Inorganw Bodks. 371 



of which he has given a figure in a more advanced state, repre- 

 senting these molecules or particles, which he supposes to liave 

 been derived from the grains of pollen, adhering to the stig- 

 ma. 



There are some other points respecting the grains of pollen 

 and their contained particles, in which I also differ from M. 

 Brongniart, namely, in his supposition that the particles are not 

 formed in the grain itself, but in the cavity of the anthera; in 

 his assertion respecting the presence of pores on the surface of 

 the grain in its early state through which the particles formed 

 in the anthera, pass into its cavity ; and, lastly^ on the existence 

 of a membrane forming the coat of his boyau or mass of cylin- 

 drical form ejected from the grain of pollen. 



I reserve, however, my observations on these and several 

 other topics connected with the subject of the present inquiry, 

 for the more detailed account which it is my intention to give. 

 July 30. 1828. 



Description of several Neiv or Rare Plants ivhich have flowered 

 in the neighbourhood of Edinburgh^ and chiejlyin the Royal 

 Botanic Garden^ durirtg the last three months. By Dr 

 Graham. 



\st Sept. 1828. 

 Calceolaria arachnoidea. 



C. arachnoidea; caule herbaceo, ramoso, patulo, foliisque lingulato-oblon- 

 gis, subdentatis, oppositis, lanato ; pedunculis terminalibus, geraina- 

 tis, elongatis, dichotoniis ; calycibus pedicellisque arachnoideis. 

 Description — Stem herbajeous, round, much branched, spreading, succu- 

 lent, woolly, hairs adpressed. Broriches opposite, sjjreading, similar to the 

 stem. Leaves (with their petioles about 5 inches long,) opposite, lingu- 

 lato-oblong, narrowing downwards into long petioles over which they are 

 decurrent, stem clasping, obscurely toothed, wrinkled, woolly on both 

 sides, middle rib and branching veins prominent on the lower side ; two 

 uppermost leaves smaller than the others, sessile, cordato-ovate, undu- 

 late, and placed at the origin of the jieduncles. Peduncles terminal, ge- 

 minate (6 inches long), dichotomous, branches spreading, and bearing 

 the pedicels in pairs. Pedicels round, undivided, and witn the calyx in- 

 volved in a cobweb-like tomentum. Bractece 2, opposite, at the bifurca- 

 tion of the peduncle, like the uppermost leaves, but smaller. Perhaps 

 it would be more correct to consider the peduncle as beginning a joint 

 lower (8 inches lower) than I have done, when it must be looked upon 

 as single, bifid, and the two upper leaves must be held as bractese. Ca. 

 lyx segments equal, ovate, pointed, spreading, woolly on the outside. 

 Corolla of uniform dull purple colour, subglobular, flattened below, gla- 

 brous within, upper lip very small, lower crenated, its neck white. Sta- 

 mens rising from the base of the corolla at its sides ; filaments straight, 

 stout, smooth, supporting the elongated bilocular anthers by their middle 

 in contact with the edge of the upper lip of the corolla ; pollen yellow. 



2 Aa2 



