98 REPORTS ON INVESTIGATIONS AND PROJECTS. 



as to be removable to another field if eventually acquired. An accessory 

 water supply was equipped and has been used during the season for irri- 

 gation of the greenhouse and gardens. 



As the work develops it becomes clearer that additional land will be 

 needed in the near future. 



The Station has this year as hitherto been the recipient of many gifts 

 of interesting Hving plants and animals to be used for breeding and of use 

 of land and materials to facilitate our investigations. 



REPORT OF DR. GEORGE H. SHULL. 



The studies on variation and heredity in plants have been continued 

 along the lines indicated in my report for last year. The addition to our 

 garden equipment of a greenhouse and an efficient gardener, both of 

 which were available December i, 1905, have increased by several fold 

 the amount and value of the work accomplished during the year. 



As compared with last year, there have been few failures in getting 

 seeds to germinate, and the number of pedigrees which have come to 

 fruition since October i, 1905, is 291, belonging to the following 46 

 species. The number preceding each specific name in this list is the num- 

 ber of distinct pedigreed families studied in that species and the number 

 following the name is the total number of individuals considered. 



No. of Indi- No of Indi- 



families. viduals. families. viduals. 



3. Commelina nudiflora L 563 I. Gentiana crinita Froel 2 



5. Lychnis alba Mill 1,521 i. Solanum aflf. lanceolatum 6 



2. Ranunculus sp 97 3. Solanum aff. nigrum L 162 



2. Chelidonium majus L 354 I. Lycopersicon lycopersicon (L-) 



2. Eschscholtzia maritima Hort. . . 25 Karst _. . 25 



3. Eschscholtzia rosea Hort 81 I. Lycopersicon solanopsis White 25 



163. Bursa bursa-pastoris (L.) I. Lycopersicon sp 25 



Britton 17,532 i. Verbascum thapsus L "SJ 



1. Bursa heegeri (Solms) 23 i. Mimulus ringens L 367 



2. Fragaria sp 50 i. Digitalis sp 161 



I. Lathyrus maritimus (L.) Bigel. 13 4. Plantago lanceolata L 266 



I. Polygala polygama Walt 3 2. Plantago major L 180 



3. Viola arvensis L 47 i. Dipsacus sylvestris Huds 114 



I. Viola papilionacea Pursh 12 15. Ambrosia artemisiaefolia L 902 



4. Viola spp 29 I. Chrysopsis argentea Small 9 



1. Oenothera biennis L 83 i. Chrysopsis graminifolia 52 



6. Oenothera cruciata Nutt 87 2. Erigeron ramosus (Walt) 



3. Oenothera gigas De Vries 439 B. S. P 180 



16. Oenothera lamarckiana Ser. .. . 2,172 7. Rudbeckia hirta L 382 



2. Oenothera lata De Vries 355 13. Helianthus annuus L 929 



2. Oenothera nanella De Vries... 244 i. Helianthus debilis 93 



4. Oenothera rubrinervis De Vries 1,038 i. Helianthus petiolaris 5 



I. Oenothera sp 11 i. Gaillardia pulchella pieta Gray. 115 



I. Clarkia pulchella Pursh 8l 2. Erechtites hieracifolia (L.) Raf. 180 



In the continuation of my investigations into the fluctuations of 

 Oenothera lamarckiana and those of its mutants, about 18,000 measure- 

 ments have been made on the buds from fifteen different pedigreed fami- 

 lies of Oenothera, representing particularly different treatment as regards 



