CALENDAR, 1820. 411 



26th. Hot weather. Thermometer eighty four degrees in 

 the shade. The Sky, though free from many definite clouds, 

 nevertheless misty, and of a whitish hazy blue. The gardens 

 are much improved by the change of weather. Campanula 

 Medium and Llnum perenne in flower already, besides nume- 

 rous Poppies, Pinks, Roses, Carnations, the Yellow Day 

 Lily, Heartseases, &c. 



27th. Apargia hispida in flower ; also Rosa canina. The 

 weather hot, but the horizon always thick and misty. 



29th. Lapsana commimis, and Crepis tectorum, and the 

 Stonecrops. 



30th. Crepis barbata, Convolvulus Nil., Cnicus paluslris, 

 C. lanceolatus, and C. arvensis, in flower. A few young 

 plants of Leopard's Bane are still flowering. The Yarrow 

 and the Achillaea Ptarmica are coming out, and the Malva 

 Moschata was out this evening. 



The Poppies, which are now numerous in blow every 

 where, appear to me to have produced the same varieties 

 from the same coloured seeds as they did last year ; that is, 

 the seed of any particular variety produces the same variety 

 again, perhaps out of a whole capsule of seeds, there being 

 only one new variety, or lusus, which becomes a plant, the 

 generality of whose seeds come up like the parent, that is, 

 like the new lusus. And this seems the manner in which 

 varieties of plants in general are formed and perpetuated. 

 With regard to Papaver somnifcrum: 1. One variety has 

 large round capsules, white petals, and white seeds. 2. The 

 next allied to this has a capsule not quite so large and round, 

 pale lilac petals, deeper purple at the unguis, and bearing 

 dingy yellowish seeds. 3. The Garden Poppy, with black 

 seeds, has many varieties, both single and double, the seeds 

 being greyer in proportion as the colour of the petals is 



