. The Canadian field-naturalist. 1978 Simpson and Catling: Spiranthes Hybrid. Ontario 35!. Figure 1. Spiranthes lacera var. lacera X romanzoffiana from ICillbear Provincial Park, Parry Sound District, Ontario. Photographed 18 July 1977. The only apparent hybrid found in 1977 was located on a drier slope with Polytrichum sp. in the partial shade oi AInus rugosa and Vacciniwn angustifolium. In addition, 30 flowering plants of S. romanzoffiana and 11 flowering plants of S. lacera var. lacera were found. One of the latter was growing among Sphagnum spp. in a damp location but the others were in dr
. The Canadian field-naturalist. 1978 Simpson and Catling: Spiranthes Hybrid. Ontario 35!. Figure 1. Spiranthes lacera var. lacera X romanzoffiana from ICillbear Provincial Park, Parry Sound District, Ontario. Photographed 18 July 1977. The only apparent hybrid found in 1977 was located on a drier slope with Polytrichum sp. in the partial shade oi AInus rugosa and Vacciniwn angustifolium. In addition, 30 flowering plants of S. romanzoffiana and 11 flowering plants of S. lacera var. lacera were found. One of the latter was growing among Sphagnum spp. in a damp location but the others were in drier places with Polytrichum sp. The S. romanzoffiana speci- mens occurred in both moist and dry places and several plants were within a metre of a plant of S. lacera. Where S. romanzoffiana occurred on drier slopes it was in shaded situations. In Ontario S. romanzoffiana is usually found in relatively moist environments, but it is occasionally encountered in places that are only seasonally moist, often becoming quite dry in mid- or late summer. Spiranthes lacera var. lacera is most often found on dry rocky ridges, in pine or oak woods, and in dry pine plantations. It has been encountered twice in Sphagnum bogs in Ontario, but this is a very unusual habitat. Spiranthes lacera var. lacera and S. roman- zoffiana are rarely found in close contact, but disused sand pits often exhibit a great variety of soil conditions over short distances and the successional nature of the vegetation and the habitat as a whole frequently leads to an unusual diversity and associations that are not commonly encountered elsewhere. Although the three apparent hybrids found in 1976 appeared intermediate between S. lacera var. lacera and S. romanzoffiana, they differed somewhat from each other. The lateral sepals were connivent forming a hood in one plant resembling 5'. romanzoffiana but another had flaring lateral sepals, more or less separated from the dorsal sepal. This latter plant had essentially whi
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