When two males meet, they approach each other, slowly undulating their bodies, and assume combat-threat display with all fins stiffly outstretched.
en.wikipedia.org Before this happens the male shows off his legs and extends them stiffly and shakes them to attract the female.
en.wikipedia.org Inflorescence terminal, a raceme of umbels, length of 825 cm, densely covered with setae towards the bae, stiffly covered with tiny hairs throughout; umbels length of 0.91.3 cm in diameter.
en.wikipedia.org The glandular, stiffly-hairy aromatic leaves are about 6 centimeters long and 8 wide, divided into 5 or 7 toothed, heart-shaped lobes.
en.wikipedia.org In flight, it holds its wings stiffly, alternating between rapid, quivering flaps and longer glides.
en.wikipedia.org