BOTN 201 - Department of Biology Herbarium - TAMU
Images of the Navasota Flora - 18 June 1995
Local 'Plantain' species (Plantago) represent a specialized element of the Plantaginaceae DELTA description. The local species pictured here, Plantago aristida shows the typical tight, small flowers that mature to produce a Taxa of the Apiaceae (Umbelliferae) are now quite evident in the Navasota Flora. This one, Polytaenia nuttallii ('Prairie-Parsley') belongs to a genus that includes only two species and these are endemic to the United States. Its sister species, P. texana, is endemic to Texas. While this 'umbel' is an inhabitant of open areas, especially roadsides, in the Brazos Valley, another distinctive element of the family, mericarp surface which allow for animal dispersal, either via fur or socks.
Many elements of the local flora have passed the adventure of anthesis. Energy, for those that managed reproductive success, is now allocated toward development of the next generation. The sandyland bluebonnet (Lupinus subcarnosus), in legume dehiscence. Pistillate flowers of the Water Oak (Quercus nigra), produced on new shoots and ready for pollen now moving toward the acorn production in that the bracts are enveloping an enlarging gynoecium. The latter will continue to expand as the embryo grows, eventually extending well beyond the acorn cap that will be formed by the bracts.
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Last updated by HDW on 24 June 1995