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在普通的观赏花卉中,刺通常是不受欢迎的。但在仙人掌类植物中,刺却是主要观赏部位之一。它形态变化多端,颜色丰富多彩,十分引人注目。各类刺的数目、形状、色彩和排列状况,能显示同种类的特征,可做为分类和观赏的一个准则。除极少数种类的刺不明显外,绝大多数仙人掌类植株均生锐刺。按着生位置的不同,可区分为中刺(中央刺)和周刺(侧刺)。中刺生于刺窝中心部位,较粗大;周刺生长在刺窝周围,呈放射状包围着中刺,较短小。通常中刺数目少而多变化,粗的象角锥,细的如刚毛,有的锐如针,有的薄似纸,还有的尖端弯钩,基部具鞘……以下用直观的彩色图片介绍一下不同种类刺的不同形态特征:
Thorn is often unwelcome in common ornamental flowers. But in cactus plants, the spines are one of the main ornamental parts. Its morphological changes, colorful and colorful, very compelling. The number of various types of thorns, shape, color and arrangement, can show the same type of feature, can be used as a guide to classification and viewing. In addition to a very small number of spines is not obvious, the vast majority of cactus plants have sharp thorns. According to the location of the students can be divided into sting (Central Thorn) and Zhou thorn (side thorn). The thorn was born in the center of the thorn, thicker; week thorn growth in the thorn around the nest, radially surrounded by the thorn, shorter. Usually less and more changes in the number of sting, the rough like pyramids, fine as bristles, some sharp as needle, some thin like paper, as well as the tip of the hook, the base of the sheath ...... The following with intuitive color pictures Introduce the different morphological characteristics of different types of thorns: