158 



Agricultural /Section 



[PT II 



more years' duration Timothy may always be sown with advantage 

 on clays and other good moist soils. 



Commercial Seed. 



Timothy-grass readily produces large quantities of seed and it is 

 (per million seeds) the cheapest of all grass seeds. Most of our 

 seed is imported from North America, but some of it is produced 

 on the Continent and also in Scotland. It may easily be obtained 

 quite free from impurities, but some samples contain such weeds 



Fig. 173. "Seed" of 

 Hieracium PUoneUa, L. 

 Mouse-ear Hawkweed 

 (with the pappus short- 

 ened). 



Fig. 174. Potentilla 

 monspelieTisis, L. 

 Upright cinque- 

 foil. 



Each x 10. 



Fig. 175. Luzula cam- 

 pestris, Br. Field Wood- 

 rush. 



as Plantago Rugelii, Dene., P. major, L., Prunella vulgaris, L., 

 Rumex sps. (Docks), Potentilla monspeliensis, and Lepidium apeta- 

 lum, etc. Alsike and White Clovers, Crested Dog's-tail, Agrostis 

 sps. and Poa sps. also are commonly present (see Figs. 151 to 154, 

 168, 170 and 174). 



The Purity should reach at least 97 to 99 per cent., and the 

 Germination 70 to 80 per cent, in four days and 90 to 96 per cent, 

 in ten days. 



Poa annua, L. 



For Botanical description see p. 122. 



Annual Meadow-grass is most abundant in the temperate 

 parts of the northern hemisphere but is also indigenous to many 

 other parts of the world. It is very common in Britain. It is of 

 little value to the farmer on account of its small produce and 

 short length of life. Occasionally it is found as a constituent of 

 pastures and when constantly grazed and prevented from flowering 

 it tends to become more permanent. It is possible to form lawns 



