| 词条 | Hackelia nervosa |
| 释义 |
|image = Sierra stickseed Hackelia nervosa tight flowerheads.jpg |genus = Hackelia |species = nervosa |authority = (Kellogg) I.M.Johnst. }} Hackelia nervosa is a species of flowering plant in the borage family known by the common name Sierra stickseed. It is native to the mountains of California, especially the Sierra Nevada and its foothills,[1] in areas with some moisture up to near treeline. Its range may extend into Nevada. Sierra stickseed is a perennial herb starting from basal patches of oblong leaves each up to 12 centimeters long. Erect stems rise to heights between 40 and 70 centimeters, with gradually fewer and smaller leaves toward the tops. The stems hold cyme inflorescences of deep sky blue to violet flowers (see top left image); the buds are often pink. Each petite flower has five oblong rounded-end lobes, with a slightly raised appendage at the base of each forming a white ring around the yellow anthers. The flowerheads start off quite compact, but later the stems and petioles elongate to give a more open appearance (image center left). The fruit (the "stickseed") is a nutlet about half a centimeter long, covered with barb-tipped prickles that stick to almost anything (image at lower left), explaining the common name of this genus. References1. ^{{citation |author= Norman F. Weeden| year= 1996| title= A Sierra Nevada Flora|edition= 4th| publisher= Wilderness Press}} External links
2 : Hackelia|Flora of California |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。