yourpal 的最愛
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什麼
屬 Heydenia觀察者
tyson_ehlers描述
Habitat: on beargrass (Xerophyllum tenax) leaves near melting snow.
Ascocarps: dark burgundy, nearly black, sessile or with short, stout stalks, 0.7-1.3 mm tall, arising from a reddish-brown discoid, loosely attached subiculum. Stalk: 0-0.6 mm, capitula 0.5-0.8 high x 0.5-0.8 wide filled with a white spore mass. Asci: 8-spored, 85-125 x 11-12 um, with long thread-like tails. Peridium: yellow-brown, with a reticulated pattern. Cortex hyphae: septate, brown, no clamps, rounded tips, ~3.5-4.5 um diam. Spores: broadly elliptic, 10.2-12.3 x 8.5-10.2 µm, smooth.
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觀察者
tyson_ehlers描述
Sporocarp: small spherical spore-sac on a slender stem. Spore-sac: 8 mm tall x 13 mm wide, outer surface off-white, granular with adhered dirt particles, lower 1/3 dark brown. Stem: 13 mm long x 3 mm wide, off-white, longitudinally striate, with a swollen base and short fibrils below ground. Peristome: small opening on a raised dark fibrous matt, 3mm diam. x 1mm tall. Socket where stem attaches to peridium separating with torn membrane at its border. Spore mass: ochraceous ferruginous, spores (4.3)5.0-7.4(8.2) µm (avg. 5.9 µm), subglobose to irregularly elliptic, ornamented with prominent raised ridges, pale yellow brown in KOH. Capillitium threads: 2.0-6.0 µm diam., colourless, branched, abruptly swollen at yellowish brown septa, tips expanded and squared off, threads coated with scattered crystalline plaques. Habitat: single sporocarp fruiting in silt-loam soil in fescue-dominated grassland.
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觀察者
jhorthos描述
Large cluster of plants, just on the Teanaway Peak side of the Iron Peak serpentine. On scree slope, probably a mixture of Teanaway Peak mafic rock and Iron Peak ultramafic rock.
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觀察者
joeysantore描述
First image female flower. Second image male. 5th & 6th image female Plants dioecious and abundant at this location. Nearly 60% of hosts (Dalea frutescens) infected.
Re: flower morphology:
The species is dioecious so all flowers are unisexual. The flowers lack petals. The perianth is a spiral of sepals. Male and female flowers arrange their sex organs on a unisexual column (like unisexual orchids in the genus Catasetum). In both flowers the central column terminates in a fleshy disc I presume would be called a compitum. In female flowers the receptive, stigmatic papillae ar arranged under the compitum on the surface of the style. In male flowers the column is a pistilode also with a fleshy compitum. Sessile anthers re fused to the pistilode style. That's the best I can do at short notice. Have you seen the attached? I think the illustration is quite clear. How many stamens can you count attached to the pistilode neck?
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描述
Most important thing for keying but hard to see and photograph: upper midrib has minute ferruginous hairs.
Leaves glabrous on both sides (except for midrib); leaf back glaucous but leaf surface is green; ovaries glabrous, stipes ~1 mm, capsules no more than 6 mm max; petioles not glaundular dotted; floral bracts persistent & dark brown; catkins on leafy branchlets; leaf margin mostly entire.
Stipules can be either rudimentary (as in this one) or foliaceous, so the species keys both ways at couplet 27 in Argus 2008 Salix of AB.
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什麼
假芒萁 (Sticherus truncatus)觀察者
calebcatto地點
5QR2+H8, Bukit Dinding, 54200 Kuala Lumpur, Federal Territory of Kuala Lumpur, Malaysia (Google, OSM)
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什麼
千里光屬 (黃菀屬) (屬 Senecio)觀察者
johndreynolds描述
Bald Mountain, Elk Valley, Kootenays, BC, Canada
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描述
Here's what we use to identify var. davisii:
-habitat is along rivers, usually older non-active sandy cobble bars that have re-vegetated to varying degrees, but also occasionally on active river shorelines
-leaflets are irregularly whorled (not all whorled, like O. splendens, and not all paired, like other species of Oxytropis)
-there are minute club-shaped structures scattered along the edge of the stipule among the straight hairs (tear leaf base carefully off a fresh plant and examine with hand lens in good light from the inside - it's really hard to find these structures without removing the leaf base from the plant)
-the flower colour varies between dark pink and light purple, but is not as bright pink as O. splendens
-the inflorescence in flower is relatively shorter than the very long infloresence of O. splendens in flower
-the leaves are grayish green to green in aspect (compared to O. splendens leaves that have abundant silky pubescence and so look gray and fuzzy)
That said, we do find forms intermediate between O. campestris var. davisii and O. splendens as mentioned in Welsh's 1991 paper on p. 394, and that complicates things.
