The grasses of Iowa

FLORAL DISPLAY IN PHLOX AND GERANIUM: ADAPTIVE ASPECTS

“…The first set of five anthers usually dehisced on day 1 (or 2), the second set of five on day 2 (or 3), and the stigma usually opened on day 3-5 (after the second set of anthers dehisced). Geranium is thus protandrous (see also Robertson, 1889;Pammel, 1903;Martin, 1965). Only the inner surfaces of the distal ends of the style are stigmatic (jones and Jones, 1943).…”

The composition and properties of ragweed seed oil

“…A quantitative yield of sterols from the extracted oil was obtained by extracting four separate 5-g. samples according to the official method for determining unsaponifiable matter (1). The four extracts were combined to give two equal samples, which were then evaporated to dryness and each dissolved in 50 ml.…”

“…The present need for large quantities of fats and oils in the United States has stimulated interest in the investigation of new sources of these materials. Microchemical tests on the seed of the common ragweed (Ambrosia eliator) by Pammel and Dox (1) showed that these seeds contain large amounts of fat. However, no detailed investigation of this oil has been made in spite of the fact that the ragweed grows very abundantly in the United States.…”

Germination of Grass Smuts

“…1) a possible connection of U. togata (called pustulata by the authors) and U. sphaerogena with U. bullata was suggested (Pammel et al, 1901), but the identity of the bullata here referred to is not clear, and the recent association of U. bullata, as he understands it, with U. bromivora, by Fischer (1937), casts doubt upon its connection with togata and sphaerogena. It is not possible to decide from Brefeld's (1895) and McAlpine's (1910) descriptions whether bullata might belong in table 1 or table 2. U. cynodontis, Sphacelotheca sorghi, and S. cruenta resemble U. togata in that they too form simultaneously abundant conidia and hyphae.…”