Description & Remarks
A short living perennial, with silvery stems and leaves, 20-50 cm tall. Stems prostrate to erect. Leaves opposite, oval, entire and pointed.
The corolla is large and impressive, 20-25 mm across, pale blue (or pinkish). The flower bends downwards. Corolla limb is star shaped, flat with triangular lobes. The stamens and the pistil exert down beneath the flower, tightened together into a cone. This flower pollination is called “buzz pollination” – the pollen are not spontaneously dispersed, but only by pollinating insect. Bees approach the flower from beneath, hold it with their mouth organs and flutter their wings rapidly while buzzing loudly. This buzz creates resonance that shakes the stamens and causes spilling of the pollen as from saltcellar holes. Part of the pollen falls on the bee, that carries it to another flower and transfers it to its pistil’s stigma, thus pollination is done. The bees experting this method are the big and strong kind of bees.
The calyx has pointed lanceolate lobes, it grows a lot in the fruiting phase and contains up to 4 flat oval, bowl-like mericaps that are 10 mm long. The mericap margins are rolled inwards.
T. boissieri is endemic to Israel and its surroundings, found also in N Saudi Arabia. It is rare in Israel and known in large populations mainly from the slopes of the Samaria Desert till Wadi Talkid area, where they bloom every year. In the lower Judean Desert above the Dead Sea it is rarer and in the long dry periods of dryness it is in a dormant state or survives in seed form.
T. boissieri was discovered and described by George Post (Beirut) and named after the famous Swiss botanist Admond Boissier.
O. Fragman-Sapir & Y. Orgad, 2021
Translation – Sara Deutch
- Hebrew with Vowels:
- צַמְרוּרַת בּוּאַסְיֶה