01/12/2021
H**e tetragona
H**e tetragona is a sub-alpine plant of the family Plantaginaceae, which is endemic to New Zealand.
H. tetragona can grow up to 1 metre high and has very small, yellow-green leaves that completely surround the stem. White flowers are produced during summer.
The plant gets its name from its distinctive four-sided branches. H**e /ˈhiːbiː/[1] is a genus of plants native to New Zealand, Rapa in French Polynesia, the Falkland Islands, and South America. It includes about 90 species and is the largest plant genus in New Zealand. Apart from H. rapensis (endemic to Rapa), all species occur in New Zealand. This includes the two species, H. salicifolia and H. elliptica, that have distributions extending to South America. The genus is named after the Greek goddess of youth, H**e.
H**e has four perpendicular rows of leaves in opposite decussate pairs. The flowers are perfect, the corolla usually has four slightly unequal lobes, the flower has two stamens and a long style. Flowers are arranged in a spiked inflorescence. Identification of H**e species is difficult, especially if they are not in flower. The plants range in size from dwarf shrubs to small trees up to 7 metres, and are distributed from coastal to alpine ecosystems. Large-leaved species are normally found on the coast, in lowland scrub and along forest margins. At higher altitudes smaller-leaved species grow, and in alpine areas there are whipcord species with leaves reduced to thick scales.