Some goldenrods of the Wissahickon

Along the Wissahickon trail, upstream from the Henry Avenue Bridge, Solidago flexicaulis (with axillary inflorescences and wide leaves) is common, right by the trail, underneath the trees, on the way to Forbidden Drive.

Along the trail above, on the other side of the creek and up the hill in the woods, where it’s a bit drier, but still shady, Solidago caesia (with axillary inflorescences and narrow  leaves) is common.

On the trail leading from Blue Stone Bridge, and leading along downstream (and up in the woods on the hill), both Solidago caesia and Solidago flexicaulis can be found.

In open areas, along the stream, Solidago gigantea (with smooth, glaucous stems) is very common; Solidago rugosa (with scabrous leaves) is also there.  Underneath the Henry Avenue Bridge, there’s a thick stand of Solidago gigantea, and right next to that, there is an individual of Solidago rugosa.

Up on the hillsides, Solidago rugosa is the more common one in open areas.

And so, overall, it appears that in this area, shady places that are moist have Solidago flexicaulis, shady areas that are drier have Solidago caesia, open areas that are moist have Solidago gigantea, and open areas that are drier have Solidago rugosa – and there is co-occurrence, in certain habitats.

Along the trail that goes from the white pines of Hermit Lane and passes under the Henry Avenue Bridge (and then goes onwards to Lovers Leap), there are no goldenrods along the trail, until after you pass beyond the bridge above.

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Cocklebur and goldenrods

Xanthium strumarium (with cordate leaf bases) is in fruit along the Wissahickon trail, downstream from the Henry Avenue Bridge, and Solidago caesia (with lanceolate leaves and sometimes-blue-and-glaucous stems, and axillary inflorescences) is flowering along the trails up above in the woods – Solidago flexicaulis (with wide basal leaves, and axillary inflorescences) is flowering along the Wissahickon trail, just a bit downstream from Forbidden Drive (under the trees along the trail).

Reading Viaduct

Broomsedge (Andropogon virginicus – with two racemes per peduncle and concealing bracts) is fruiting on the Reading Viaduct.  Prairie three-awn (Aristida oligantha – with three very long awns) is in fruit.  Solidago rugosa is flowering.  All are very common up there.

Smooth goldenrod

On the north side of Tower Street, at Pensdale Street, in the scrub there, an individual of Solidago gigantea (it has 3-nerved leaves, and its lower stem is somewhat glaucous and smooth, and the top of the stem, at the inflorescence, is hairy – also, it is losing its lower leaves) is flowering (with a terminal inflorescence).