What is having the form of a pencil; furnished with a pencil of fine hairs; ending in a tuft of hairs like a camel's-hair brush, as the stigmas of some grasses called?

penicillate — Having the form of a pencil; furnished with a pencil of fine hairs; ending in a tuft of hairs like a camel's-hair brush, as the stigmas of some grasses. (Webster's 1913.)

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