A new species of Machaeranthera sect. Psilactis, M. odyssei, is described from the mountains of southeastern Nuevo Leon, Mexico, and adjacent Tamaulipas. The new species apparently is endemic to a ...small area around Cerro Pena Nevada, but it is abundant in that area. The plants are perennial with horizontal rhizomes and fibrous roots, primarily monocephalous with spatulate basal leaves and reduced cauline leaves, and they have a striking glandularity on the stems, upper leaves, and phyllaries. Meiosis and pollen formation are normal; the chromosome number is n = 9. Machaeranthera odyssei is closely related to M. mexicana Turner & Horne, but the habit of the new species is unique in the section and genus.
Using alfalfa as the trial crop, calcium metaphosphate and "fused rock phosphate" were compared with superphosphate on a field of Clarion clay loam, the surface soil of which was slightly acidic but ...not lime-deficient. Seven weeks before seeding the alfalfa, the three phosphates were applied at two rates, namely, 44 and 88 pounds per acre of citrate-soluble P(2)O(5), and worked into the soil. Two years later these phosphates were top-dressed at the lower rate on well-established alfalfa stands on plots not previously fertilized. Applied on the plowed ground in advance of seeding, the metaphosphate increased the yield virtually as much as the superphosphate in each of the following three crop seasons. When spring top-dressed on the established stand, metaphosphate was far inferior to superphosphate in the first season, but almost equal in the second. When applied at a rate giving as much citrate-soluble and considerably more total P(2)O(5), and worked in before seeding, the "fused rock phosphate" caused larger yields than the other phosphates throughout the 3 years of the experiment, but it showed little or no benefit when used as a top-dressing. In 16 counties in western Minnesota, where lime deficiency is of rare occurrence, calcium metaphosphate was tried alone as a spring top-dressing on alfalfa using many established fields and also many newly sown with small grains. The benefit in the first season was slight but in the second much greater. It appears that both calcium metaphosphate and the T. V. A. product commonly designated "fused rock phosphate" will be as effective as superphosphate when well incorporated with the soil in advance or at time of seeding or planting of crops, at least on all but calcareous soils. It is suggested that conflicting evidence previously presented as to the effectiveness of the two phosphatic materials may be attributed to the differences in manner and time of application employed by the various investigators.
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A narrow endemic of southwestern Utah, Erigeron flagellaris A. Gray var. trilobatus Maguire ex Cronq., is given specific status as Erigeron proselyticus Nesom. It is closely related to two other rare ...endemics of the Zion National Park area, Erigeron religiosus Cronq. and Erigeron sionis Cronq., but it does not share a similarly close relationship with typical E. flagellaris. Erigeron proselyticus in diploid; E. sionis is tetraploid and probably agamospermic; three diploid populations and several triploid populations of E. religiosus are known, including a population of triploids from the site of a paratype collection of this species. Variation in these triploids suggests the possibility of hybridization with Erigeron divergens Torr. & Gray, or with an unknown species no longer occurring sympatrically with E. religiosus,.
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