保育與休閒部 保育。保護。享受。
保育與休閒部 
目錄皮埃蒙特花崗岩平岩
皮埃蒙特南部的露露、斜坡的花崗岩突出，支持著地獄和稀疏的血管植物特徵的獨特社區。這個社區群體從阿拉巴馬州東部到弗吉尼亞州，可能最具代表性在佐治亞州，另一個值得注意的群體位於北卡羅來納州中部。弗吉尼亞州的皮埃蒙特花崗岩岩僅限於皮埃蒙特南部中部的六縣地區。它們的海拔範圍從約 70 到 100 米（230 至 320 英尺），並存在於真正的花崗岩和一系列相關岩石，例如花崗岩石和格蘭多利石上。大多數例子都位於溪流沿著平緩的斜坡上，隨著時間的推移，水的侵蝕力使岩石表面磨損平滑，形成了充滿石頭的小凹陷。
Lichens (e.g., Xanthoparmelia conspersa, Cladonia caroliniana , and other Cladonia spp.) and the bryophyte Grimmia laevigata are dominant biota on granitic flatrocks, covering much of the exposed bedrock. However, vascular plants dominate locally in crevices, flats, and depressions where moisture and thin layers of detritus accumulate. Among the vascular plants, Small's stonecrop (Diamorpha smallii), Small's purslane (Portulaca smallii), and granite flatsedge (Cyperus granitophilus) are globally rare and endemic to these habitats. Other typical vascular plants include roundleaf fameflower (Phemeranthus teretifolius), which typically roots in bryophyte patches; Appalachian sandwort (Minuartia glabra), rock spikemoss (Bryodesma rupestre), common buttonweed (Hexasepalum teres), glade rushfoil (Croton willdenowii), broomsedge (Andropogon virginicus var. virginicus), little bluestem (Schizachyrium scoparium var. scoparium), fork-tip three-awn grass (Aristida dichotoma), purple three-awn grass (Aristida purpurascens), common hair sedge (Bulbostylis capillaris), open-flower panic grass (Dichanthelium laxiflorum), and pineweed (Hypericum gentianoides). These small-patch communities often cover less than 0.4 ha (1 ac) and are considered globally rare. Major threats include invasive non-native weeds, off-road vehicles and quarrying.
參考：貝爾登（1998），伯格（1974），弗萊明（2002 a）。
© DCR-DNH，加里 ·P· 弗萊明。
下載下面列出的每種社群類型的組成摘要統計資料表。
