REST PERIOD STUDIES WITH SEEDS 



21 



Besides the species accounted for in the three foregoing tables, 

 a large number failed to show any germination, altho observations were 

 kept up for ten months after planting. The following species were 



TABLE 7. SEEDS COLLECTED WHEN RIPE OR MATURE AND PLANTED AT 

 ONCE, BETWEEN MAY 9 AND JULY 14, 1912. ALL SHOWED ' 'IMMEDIATE" 

 GERMINATION 



Species 



Date 

 collected 



Number 

 of days 

 required for 

 germination 



Total 

 percentage 



of 

 germination 



Gramineae 



Secale cereale, L July 1 



Triticum vulgare, Vill July 2 



Avena sativa, L July 12 



Bromus ciliatus, L July 13 



Hordeum sativum, Jess . July 13 



Lolium perenne, L July 13 



Liliaceae 



Asparagus officinale, L July 3 



Urticaceae 



Ulmus scabra, Mill May 9 



Ulmus fulva, Michx May 15 



Ulmus americana, L May 9 



Morus alba, L June 15 



Leguminosae 



Caragana aborescens, Lam July 2 



Aceraceae 



Acer saccharinum, L May 15 



Malvaceae 



Althaea rosea, Cav July 20 



Uinbelliferae 



Pastinaca sativa, L July 6 



Solanaceae 



Solanum Dulcamara, L July 15 



Cucurbitaceae 



Cucumis Melo, L July 18 



Compositae 



Centaurea grandiflora, Hort July 5 



7 

 7 



24 



11 



6 



11 



26 



14 

 17 

 13 

 17 



18 



29 

 30 

 34 

 24 

 36 

 37 



46 



18 

 2 



15 

 2 



81 



55 



53 



19 



51.5 



97 



5.5 



