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Notes On Saxifragaceae, Edwin B. Smith
Notes On Saxifragaceae, Edwin B. Smith
Journal of the Arkansas Academy of Science
Over half of the Arkansas members of the Saxifragaceae are notable due to unusual morphology or distribution within the state. They range from the inconspicuous Lepuropetalon spathulatum (Muhl.) Ell. to the conspicuous Hydrangea arborescens L. Several genera (Heuchera, Parnassia, Philadephus, Ribes) include species with highly restricted ranges in Arkansas, and one includes a single species, Mitella diphylla L., known in Arkansas only from Stone County. Special attention is called to problems in Saxifraga and Heuchera, and a modified treatment of Heuchera arkansana is proposed. An annotated list and list of excluded names for the Arkansas Saxifragaceae is included.
The Distribution Of Cane, Arundinaria Gigante (Poaceae: Bambusoideae), Daniel L. Marsh
The Distribution Of Cane, Arundinaria Gigante (Poaceae: Bambusoideae), Daniel L. Marsh
Journal of the Arkansas Academy of Science
The distribution of cane in the United States was compiled on a county basis from previous records, correspondence, and field work. Ecological correlations were considered. The range appears to be limited primarily by temperature and precipitation. Two geographic populations correlate with major drainage divisions. The broad ecologic amplitude of cane is indicated by its occurrence in many different community types.
Comparative Studies Of The Witch Hazels Hamamelis Virginiana And H. Vernalis, Jack L. Bradford, Daniel L. Marsh
Comparative Studies Of The Witch Hazels Hamamelis Virginiana And H. Vernalis, Jack L. Bradford, Daniel L. Marsh
Journal of the Arkansas Academy of Science
An investigation of Hamamelis vernalis Sarg. and H. Virginiana L. was begun in southwestern Arkansas in the tall of 1976. An overlap of flowering periods occurred from late November through December, affording the possibility of hybridization. At one site the two taxa flowered simultaneously only 30 yards apart. Variation occurs in both taxa and there is a degree of overlap in most characters, but the composite of diagnostic features distinguishes the two species. The hybrid origin of H. vernalis suggested by Jenne (1966) does not seem likely.