학명 : Danthonia spicata (l. ) Roem. & Schult.
분류 : Poaceae/ Danthonieae/ Danthonia
영명 : Poverty Grass
사진: 2021.07.01 가평 견치봉
전초의 모습 (모눈 크기 1mm이므로 70cm정도 되어 보인다)
줄기는 포기져 나고 곧추서며, 20-80cm이다.
초체 하반부
초체 상반부
화서 부분 (모눈 크기 1mm), 성숙하면 개방형이 된다
아래부터는 모눈 크기는 2mm
원추화서는 개방형으로 2-5개의 가지를 낸다
엽초는 무모이거나 잔털이 있다고 하였는데 위의 것들은 모두 털이 있다
줄기 하부의 잎과 엽초
제4마디
마디를 세어보니 모두 5개이다, 마디 자체는 무모이다
엽신은 가늘고(폭 1-2mm) 안으로 말린다
성숙한 화서는 개방한다
소수는 쐐기형으로 옆으로 눌리고 10-13mm, 4-9개의 소화로 구성된다
2개의 포영은 협피침형으로 서로 비슷하고(10-13mm) 털이 없으며 소화보다 길다.
소화 기반에는 털이 있다고 한다
호영은 타원형으로 용골이 없고 3.5-5mm, 표면에 잔털이 있고 가장자리에 가는 털이 있다.
끝은 깊게 2갈래로 파이고 5-7mm의 구부러진 까락이 있다
호영, 내영(호영과 비슷한 길이이다), 영과의 모습
벼과.사초과 생태도감 설명
Flower
Loose, erect, raceme-like branching cluster at the top of the stem, up to 2 inches long, the branches erect to spreading at flowering becoming more erect in fruit. Branches typically have a single spikelet (flower cluster), occasionally 2 on lower branches. Spikelets are short-stalked, 10 to 13 mm (~3/8 to ½ inch) long, slightly flattened, narrowly lance-elliptic in outline and have 4 to 9 florets; the terminal floret may be underdeveloped.
At the base of a spikelet is a pair of bracts (glumes), both alike, thin and papery, hairless, narrowly lance-shaped tapering to a pointed tip, 10 to 13 mm long, 3 to 5-veined, and longer than the group of florets. Florets are surrounded by a pair of bracts (lemma and palea), the lemma thicker than the glumes, 5-veined, sparsely long-hairy, the body 3.5 to 5 mm long, notched and forming 2 pointed teeth at the tip with an awn arising from between the teeth, the awn 5 to 7 mm long and initially straight but becoming bent in the lower half and spirally twisted below the bend; the palea is 2-veined, about as long as the lemma body, blunt at the tip with a fringe of short hairs round the edges. The thickened base of the floret is flanked by tufts of short, white hairs. Arising from the base and running along the palea is a short, hairless stalk (rachilla extension).
Leaves are basal and alternate but mostly near the base except for 1 or 2 leaves farther up the stem. Upper leaves are erect, up to 2 inches long, usually hairless and flat. Lower leaves are up to 6 inches long, up to 3 mm (about 1/8 inch) wide, usually rolled in along the edge (involute), least sparsely long-hairy on both surfaces, usually becoming curly with age. Old leaves may persist to the next season.
Sheaths are thin and whitish along the edges, with a tuft of long white hairs on each side at the tip. Lower sheaths are variably covered in fine, spreading hairs; upper sheaths are often hairless. The ligule (membrane where the leaf joins the sheath) is a fringe of hairs up to 1 mm long. Nodes are smooth. Stems are erect, short-hairy below the nodes, smooth above, usually multiple from the base and forming dense clumps. Self-fertile, bud-like flowers (cleistogamous) may develop in the lower sheaths.
Fruit:
Spikelets are light green to whitish at maturity, the florets shedding individually as each grain matures, leaving the glumes behind on the stalk. Grains (seeds) are brown and about 2 mm long.
Notes:
Poverty Grass is a common grass of sandy or rocky soils in open deciduous and Jack pine forest, trail edges, hillsides, gravel pits, rocky ledges, outcrops and bluffs, and on the rocky north shore of Lake Superior. It is a variable species, with the degree of hairiness, curling of basal leaves, spreading of panicle branches and extensiveness of cleistogamy at least partially determined by the amount of light and/or moisture. Specimens in shadier or wetter habitats may be hairier with less curly leaves than those in more open, drier spaces. The persistent, curly leaf clump can be diagnostic even early in the season when flowering stems are not present. Poverty Grass is similar to Avenula species, which have lemma about twice as long, and their ligules are long and membranous, not a fringe of hairs.
https://www.minnesotawildflowers.info/grass-sedge-rush/poverty-grass