Arbuscular mycorrhizal fungal assemblages associated with serpentine and non-serpentine ecotypes of
Collinsia sparsijlora showed that plant ecotypes are associated with distinct AMF assemblages (Schechter & Bmns, 2008); however, a common garden test of host-symbiont specificity provided no evidence of adapted host ecotype-AMF specificity, suggesting that soil type, not microbial specificity, is key to determining AMF assemblage structure in C.
Collinsia parviflora, an annual, spring plant does not appear to germinate in time to be suitable for Taylor's checkerspot post-diapause larval feeding (manuscript in prep.).
Collinsia verna (Scrophulariaceae), a winter annual plant, germinates in the fall in response to diurnal temperature fluctuations (Baskin and Baskin 1983), overwinters under the leaf litter and snow as a small rosette, and bolts and flowers in mid to late May in mesic floodplain forests throughout the Midwest.
Opportunistic species (Cirsium arvense,
Collinsia parviflora, Gayophytum diffusum, and Lactuca serriola), which frequently were sparse at individual sampling points, were sampled along 1 m wide belt transects between sampling points.
Agyneta olivacea (Emerton 1882)--hy-ne; * Allomengea scopigera (Grube 1861)--bo-ne, in Nearctic restricted to the western half; Aphileta misera (O.P.-Cambridge 1882)--bo-ne; Bathyphantes gracilis (Blackwall 1841)--bo-ne; Carorita limnaea (Crosby & Bishop 1927)--bo; Centromerus sylvaticus (Blackwall 1841)--bone; Cnephalocotes obscurus (Blackwall 1834)--bo-ne;
Collinsia holmgreni (Thorell 1872)--hybo; Diplocentria bidentata (Emerton 1882)-- bo-ne; Diplocentria rectangulata (Emerton 1915)--bo; Dismodicus bifrons (Blackwall 1841)--bo-ne; Erigone arctica (White 1852)--ar-bo-mo, represented by series of subspecies, none of which has Holarctic range; E.
The host plant in clearings,
Collinsia torreyi, typically senesced during the breeding season, but the host plant in outcrops, Pedicularis semibarbata, did not.
Fitness consequences of mating system, seed weight and emergence date in a winter annual,
Collinsia verna.
In
Collinsia (Cheloneae/Collinsieae), the upper lip absorbs UV radiation, whereas the lower lateral lobes reflect it, and the folded median lobe shows a mixed pattern (Rust & Clement, 1977).
Inbreeding depression in four populations of
Collinsia heterophylla Nutt (Scrophulariaceae).
The only site of
Collinsia verna is on the edge of an open wet area near the border of North and South Woods.
Nevertheless, the decrease observed in germination is much higher than that found in
Collinsia heterophylla, a species with a lower outcrossing rate than P.
For example, Kalisz (1991) found that the probability of
Collinsia verna seeds persisting and emerging from the soil seed bank was significantly affected by spatial and temporal environmental variation, and that seedlings emerged significantly later out of experimental seed banks containing older seeds than adjacent unmanipulated seed banks.
Effects of seed parent on sequential life cycle traits were also diluted in greenhouse-raised Raphanus sativus (Marshall and Whittaker 1989), but not in greenhouse-raised
Collinsia verna (Kalisz 1989).
In contrast, Thiede (1996) detected significant [V.sub.Am] for seed mass and other traits in
Collinsia verna.
Fitness consequences of mating system, seed weight, emergence date in winter annual,
Collinsia verna.
