balloon plant with its spiny capsules - gomphocarpus physocarpus - swan plant or bishop`s balls

aerated africa air america asclepiadaceae asclepias bag balloon balloonplant balls bishop bishops bladder bloom blooming blowing brasiliensis bush butterflies butterfly capsule caterpillar cotton decorative dilated distended filled flower flowers follicle food gomphocarpus green hair hairs head herb herbaceous india indoor inflated inflation jamaica kerala leaf leaves lime milk milkweed nail nailhead ornamental perennial physocarpa physocarpus plant pod pods puffed puffy sac seed seeds showy shrub species spheroid spines spiny swan swelling tree undershrub unique weed