The predominant form of apomictic reproduction in Tripsacum is characterized as being diplosporous pseudogamy of the Antennaria
type [Anennaria alpina (L.
Lycopus sinuatus, Solidago lanceolata, Spiroea salicifolia, Antennaria
margaraticea, Prunella, Rumex acetosella, Raspberries, Wool-grass, Onoclea, etc.
Some flowers you may notice along the way are yampah, antennaria
, stickseeds (they look like forget-me-nots), arenaria, purple-flowering Sierra onion, sulfur flower (Eriogonum umbellatum), alpine shooting star, and several paintbrush, lupine, monkeyflower, and penstemon species.
saccharum 4 X X X X Actaea pachypoda* 7* X* X* X* Aesculus glabra 5 X X X X Ageratina altissima 2 X X X X Agrimonia parviflora 4 X X X ALLIARTA PETIOLATA -- X Allium tricoccum* 7* X* X* Anemone acutiloba* 8* X* X* X* Antennaria
neglecta 3 X X Arisaema dracontium 5 X Arisaema triphyllum 4 X X X Asarum canadense 5 X X Asimina triloba 6 X X X X Aspenium platyneuron 3 X BERBER1S THUNBERGII -- X Boehmeria cylindrica 3 X X X X Brachyelytrum erectum 6 X Campanulastrum americanum 4 X Campsis radicans 1 X Cardamine concatenata 5 X Carex grayi 5 X Carex jamesii 4 X Carex laxiflora* 7* X* X* X* Carex tribuloides var.
The most frequently occurring were Juncus trifidus, Poa alpina, Dryas octopetala, Bistorta vivipara, Antennaria
dioica and Omalotheca supina (Figure 4).
Species that survived to 8 March 2010 included Antennaria
plantaginafolia, Bouteloua curtipendula, Coreopsis auriculata, Eryngium yuccafolium, Phlox bifida, Sedum album, Sedum rupestre, and Sedum spurium.
virginica, Helianthus laevigata (not an endemic),
During meiosis or apomeiosis, in polysporic or diplosporic species, respectively, other embryo-sac-specific genes may be differentially expressed, which either limit (bispory and Taraxacum and Ixeris types of diplospory) or prevent (tetraspory and Antennaria
type diplospory) cytokinesis.
In the only other field study known to us where life histories of mixed populations of sexuals and asexuals were extensively studied, Michaels and Bazzaz (1986) reported a higher seed production, but smaller seeds and lower survival, of apomictic Antennaria
parlinii when compared to sexual conspecifics.
At old camps, carries, and logging-paths : Cirsium arvense (Canada thistle), Prunella vulgaris (common self-heal), clover, herds-grass, Achillea millefolium (common yarrow), Leucanthemum valgare (white-weed), Aster macrophyllus, Halenia deflexa East Branch (spurred gentian), Antennaria
margaritacea (pearly everlasting), Acta rubra and alba, wet carries (red and white cohosh), Desmodium Canadense (tick-trefoil), sorrel.
nevadensis (Chiarugi) Luceno O,C Antennaria
Continental plant species, such as Antennaria
lanata had small seeds with fluffy pappuses, and most seeds were probably moved horizontally from the soil surface soon after sowing.
Other studies with Antennaria
(Michaels and Bazzaz 1989) and Daphnia pulex (Lynch et al.
05 SE) cover of bare ground with < 1/4 m high herbaceous species including Antennaria
neglecta (field pussytoes) and Fragaria virginiana (barrens strawberry) (Fig.