▁w ool ▁card er ▁be e ▁( An th id ium ▁man ic atum ), ▁which ▁scra pe ▁the ▁hair s ▁from ▁the ▁plant ▁in ▁order ▁to ▁use ▁them ▁for ▁building ▁their ▁n ests . ▁ ▁Description ▁ ▁St ach ys ▁is ▁a ▁genus ▁of ▁shr ubs ▁and ▁annual ▁or ▁per enn ial ▁her bs . ▁The ▁st ems ▁vary ▁from ▁ ▁tall , ▁with ▁simple , ▁opposite , ▁tri angular ▁leaves , ▁ ▁long ▁with ▁ser rate ▁marg ins . ▁In ▁most ▁species , ▁the ▁leaves ▁are ▁soft ly ▁hair y . ▁The ▁flowers ▁are ▁ ▁long , ▁cluster ed ▁in ▁the ▁ax ils ▁of ▁the ▁leaves ▁on ▁the ▁upper ▁part ▁of ▁the ▁stem . ▁The ▁cor ol la ▁is ▁ 5 - lob ed ▁with ▁the ▁top ▁lo be ▁forming ▁a ▁' hood ', ▁varying ▁from ▁white ▁to ▁p ink , ▁pur ple , ▁red ▁or ▁pale ▁yellow . ▁ ▁Circ ums cription ▁The ▁distinction ▁between ▁St ach ys ▁and ▁other ▁gener a ▁is ▁unclear ▁and ▁has ▁varied ▁from ▁one ▁author ▁to ▁another . ▁In ▁ 2 0 0 2 , ▁a ▁mole cular ▁ph y log en etic ▁study ▁showed ▁that ▁St ach ys ▁offic inal is ▁is ▁not ▁closely ▁related ▁to ▁the ▁rest ▁of ▁the ▁genus . ▁This ▁study ▁also ▁found ▁six ▁other ▁gener a ▁to ▁be ▁embedded ▁within ▁St ach ys ▁as ▁it ▁is ▁currently ▁circ ums cribed . ▁The ▁embedded ▁gener a ▁are ▁Pr as ium , ▁Ph l om idos ch ema , ▁S ider itis