Rangeland seedings of spiny hopsage (Grayia spinosa [Hook.] Moq.) may be made with either bracted utricles or seeds. Problems have resulted from inconsistent use of terminology describing these 2 structures and the fact their germination and seedling emergence is not the same with similar environmental conditions and seeding techniques. We examined the flower, fruit, and seed morphology of spiny hopsage microscopically to resolve these discrepancies and provide a basis for discussing the functional roles of bracted utricle and seed components. The spiny hopsage fruit is a utricle consisting of a single disk-shaped seed contained within a thin pericarp. The utricle is enclosed in 2 papery bracteoles. Failure to recognize the obscure pericarp plus inaccurate use of terminology appear responsible for confusion in the literature. The presence and condition of seed and fruit structures can affect seeding requirements and embryo response to environmental conditions. Consequently, accurate identification of all structures associated with the fruit or seed combined with a review of seed biology and seedling establishment literature is essential for designing effective wildland seeding practices.
Allen Press plays a vital role in the dissemination of knowledge and information by partnering with organizations in the scientific, technical and medical community to promote their interests and achieve their goals. Headquartered in Lawrence, KS, Allen Press provides a comprehensive portfolio of integrated services in the broad areas of content management, online and print delivery, association management, and publishing services. Allen Press is a trusted partner of scholarly societies, professional associations and corporations nationwide.
This item is part of a JSTOR Collection.
For terms and use, please refer to our
Journal of Range Management