Some observers had found that this scattered or "secondary" radiation did strange things--it seemed to have a directionality to it and, most extraordinarily, to have a different, longer wavelength than the primary rays
. What could be going on?
Inflorescence terminal, umbellate, 5-19 cm long, 3-7 cm wide, with 6-10 primary involucral bracts, the lowermost 1-2 leaf-like and exceeding the inflorescence, the uppermost setaceous, lowest involucral bract 10-30 cm long, 1.5-2.6 times as long as the inflorescence; primary rays
5-15 ascending to curving with age, at least the thinnest more or less flexuous, flattened or compressed-trigonous, antrorsely scabrous on margins distally, smooth proximally, the longest 5-11 cm, second, third, and occasionally fourth order branching present, with the spikelets ultimately sessile or rarely short-peduncled (< 5 mm) in fascicles of 2-7 or rarely solitary at tips of primary or second order branches.