The smaller straw-colored flowers alone suggest the propriety of keeping this form specifically distinct, but even in size and color there is an occasional tendency toward the specific character. The obliquely obovate curved seeds resemble those of C. viviparus. The plant densely covered with stout ashy-gray interlocking spines is easily recognized.英文原著 · 《The North American Species of》
The covering of stout bushy interlocking spines is like that of var. deserti, but the black and reddish coloration gives a decidedly different appearance. On account of this appearance of a reddish-black brush the plant has been popularly called "foxtail cactus." The decidedly pink flowers were sent by Mr. Parish from specimens growing in cultivation in San Diego, and are not from the original collection of Mr. Alverson.英文原著 · 《The North American Species of》
Funny expression,"sleep tight." It refers to the early construction of beds Which featured a mattress suspended on interlocking ropes,which would occasionally...美剧 · 《The Big Bang Theory》