SUSPECTED SPECIES. 129 



5 grams of the fresh leaf, was fed at 2.53 p. m. to a 26-ounce rabbit. 

 No marked symptoms were noted up to 5 o'clock. The rabbit was 

 well and sound the next morning. 



Experiment 3. — On June 5, 20 grams of the fully turgid leaves 

 of plants collected on Middle Creek on June 3 was offered at 10.20 

 a. m. to a 1-pound rabbit. At 5.5 p. m. it was found that after making 

 the proper deduction for evaporation, as determined from a check, 

 the amount eaten was but little over 2.8 grams. No ill effect was 

 observed. The rabbit was not hungry when the leaves were offered. 



Experiment If.. — The residue from which the water extract of the 

 flowers used in Experiment 1 was obtained remained soaking in 50 per 

 cent alcohol until June 12, when it was evaporated down to 20 c. c. 

 Half of this was fed at 2. 10 p. m. on June 12 to a rabbit. It exhibited 

 no acute symptoms during that day and on the following da}^ it was 

 perfectly well. 



Experiment 5. — The residue from which the water extract of the 

 leaves used in Experiment 2 was obtained was likewise soaked in 50 

 per cent alcohol for the same length of time and then filtered and 

 evaporated down to 17 c. c. On June 16, 1^ c. c. of this solution, rep- 

 resenting 4.4 grams of the fresh leaves, was injected hypodermically 

 into a 25-ounce rabbit without causing any ill effect. 



SYNTHYRIS. 



{Synthyris rubra Benth.) 



An erect simple-stemmed perennial, 3 to 18 inches high, with a 

 thick rootstock, long-stemmed basal leaves and small stemless upper 

 leaves, and small purplish pink flowers in a dense leafy terminal spike, 

 blossoming in earliest spring (PI. XXVI). This plant grows on hills 

 and mountain sides throughout the State. The general distribution 

 of the species extends from Montana to Utah and westward to Oregon 

 and Washington. 



The species is common in loose soil and in turf up to an altitude of 

 about Y,500 feet near Bozeman, On May 28 it was found in flower at 

 an altitude of about 7,000 feet on Bridger Peak, where specimens were 

 collected for investigation and for the photograph here reproduced. 

 At lower altitudes it had already passed out of bloom. 



Fift}^ grams of the whole plant exclusive of the root was groiuid up 

 while still fresh in a sausage mill and soaked for a day with 100 o. c. 

 of distilled water, after which it was warmed at blood heat for a half 

 hour and then filtered, the residue being put to soak with 100 c. c. of 

 50 per cent alcohol. 



Experiment 1. — Ten cubic centimeters of the water extract, equiva- 

 lent to 5 grams of the fresh plant, was fed at 11.19 a. m. to a 33-ouuce 

 S. Doc. 160 9 



