dryopteris2's Favorites
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Γένος XyrisΠαρατηρητής
arenicolaΠεριγραφή
comparison between Xyris iridifolia (left) and Xyris difformis (right).
first photos show the difference between the shape of the spikes, and the broad flattened scape of iridifolia versus the narrowly winged scape of difformis, highlighted by the sunlight in pic 2.
3rd photo compares habit — iridifolia taller, with longer and much broader leaves; difformis shorter, with narrower leaves.
4th pic shows seed difference — elongate and dark grey in iridifolia, rounded and pale yellow in difformis.
both found together in bottomland forest, as typical; creek in background
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gracemccarthaΠεριγραφή
heads congested at tips of lateral branches, inflorescences not densely leafy; involucres 4-5 mm high; leaves oblanceolate to elliptic, margins entire or inconspicuously toothed; rays white and drying lavender and >20, stems mostly glabrous, rhizomatous perennial, phyllaries not subulate tipped, disc flowers 4-6 mm long
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janetwrightΠεριγραφή
Drainage ditch in pine forest.
Branch leaf 2.5 x 1.3mm, stem leaf 1.8 x 0.7mm.
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cypselurusΠεριγραφή
growing in rocky storm drainage basin next to the sidewalk.
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janetwrightΠεριγραφή
Gravel parking lot at golf course. Culm 15cm. Fibrous roots, annual. All leaves are cauline, 25mm x 2mm. Ligule ciliate. Inflorescnce a panicle 5cm x 3cm. Spikelets 7mm x 1.5mm, 12-15 florets. 1st glume 1mm, keeled. 2nd glume 1.5mm. Lemmas 2.5mm, strong green lateral vein. Pedicels all shorter than spikelet. Caryopsis 0.6mm x 0.3mm, no groove. 2 stamens I think.
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Κύπειρος (Γένος Cyperus)Παρατηρητής
arenicolaΠεριγραφή
comparison pic of Cyperus metzii (left), C. hortensis (center), and C. sesquiflorus (right); pic 2 shows spikelets from each plant, arranged in the same order
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williammcfarlandΠεριγραφή
Found in mesic pine forest at the edge of a road
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onagraceoidΗμερομηνία
Σεπτέμβριος 2020Περιγραφή
grosseserratus or verticillatus
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williammcfarlandΠεριγραφή
Identification by Brian Keener; rare in sub-mesic beech-magnolia forest
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williammcfarlandΠεριγραφή
Locally common in wet tupelo-maple-sweetgum swamp
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dylanpderouenΠεριγραφή
Open, sandy loam ridge with patches of reforested, early and late-successional areas throughout.
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kathymcaleeseΠεριγραφή
Key breaks(Illust. Fl. or E. TX):
Achene trigonous/styles 3-branched
Spikelets in each group arising from the same point
Leaves well developed
Scales of spikelets with tips not reflexed
Scales > 1mm long
Plants large perennials
Scales 2 keeled at base
Leaf blades, bracts, etc not nodulose
Culms smooth to the touch
Inflorescence bracts all horizontal to ascending, none like a continuation of the culm
Spikelets 10mm long, (2mm wide) achenes broadly ellipsoid,(with acuminate beak, narrow stipelike base, honeycomb surface), approx. 1.3mm long.
(lower florets maturing, shedding scales + achenes as upper ones develop)
