Xerophyte

种子

3-4.5 mm.

描述

Grusonia parishiiSN|9896]]SN|9896]]（Corynopuntia parishiiSN|9898]]SN|9898]]）是一种低矮、多分枝的植物，沿沙质地表呈铺展状垫丛或簇生生长。茎短，高10-20厘米，腹面可生根，并从起始点向外扩展，形成直径达2米甚至更大的广阔丛簇和垫状结构。茎节长达9厘米，宽3厘米，表面具肉质瘤突，被密集排列、角度分明且明显扁平的刺所覆盖，每根刺最长可达5厘米。幼刺呈红色或粉红色，随后逐渐变为灰色，最终变为白色，与短而干燥的荒漠草丛极为相似，具有出色的天然伪装效果。花为淡柠檬黄色，后渐变为鲑鱼色；果实黄色，长达8厘米。这是一种极具特征的植物，在其分布区域内不会与其他任何物种混淆。

分类学

该物种由Pinkava于1999年描述为Grusonia parishiiSN|9896]]SN|9896]]。Crook和Mottram（2001）指出，种加词“parishii”属于拼写错误，因其系共同纪念S.B. Parish与W.F. Parish二人，故应更正为parishiorum。

花

Inner perianth 1.5-2.5 cm long, pale yellow with narrow reddish midribs, 1.5-2.2 cm long. Filaments pinkish or green. Style whitish to pale yellow or dull pinkish; stigma lobes white, greenish white or pale yellow.

花期

晚春至初夏。花朵仅开放约两小时。

染色体数

2n = 22.

刺

14-22, woody, mostly borne on upper areoles or uniformly distributed over entire segment, grey to brown, with yellowish tips. Largest apical spines about 5, diverging, somewhat round, angular and flattened basally,, to 42 mm long. Central spine brown or white, long tapered. Main basal spines 5-6, whitish to pinkish to tan, strongly bent backward, flattened, 25-45(-58) mm long margin white, thick, sheath separating only at tip.

茎

10-20 cm in series of usually 1-2 stem segments, from fibrous roots. Segments more or less obovoid, gradually narrowed basally and club shaped, basal to terminal about 5-9 cm, 2-3 cm diameter. Tubercles separate,12-25 mm long, 3-8 mm high wide, 4-6 times longer than wide.

果实

club-shaped , with a deep umbilicus at the summit, 3.5- 5.5(-8) cm long, 1.5-2 cm in diameter, fleshy, yellow; usually not spiny or only weakly so but completely covered with dense radially arranged yellow glochids.

刺座

Round, c.5 mm in diameter, with grey to white wool. Glochids yellow, 5-8 mm long.