sinistrorse

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sin·is·trorse

 (sĭn′ĭ-strôrs′)
adj.
Growing upward in a spiral that turns from right to left: a sinistrorse vine.

[Latin sinistrōrsus, turned toward the left, contraction of *sinistrōversus : sinistrō, toward the left, from ablative of sinister, left + versus, past participle of vertere, to turn; see wer- in Indo-European roots.]

sinistrorse

(ˈsɪnɪˌstrɔːs; ˌsɪnɪˈstrɔːs)
adj
(Botany) (of some climbing plants) growing upwards in a spiral from right to left, or clockwise. Compare dextrorse
[C19: from Latin sinistrōrsus turned towards the left, from sinister on the left + vertere to turn]
ˌsinisˈtrorsal adj
ˈsinisˌtrorsely adv

sin•is•trorse

(ˈsɪn əˌstrɔrs, sɪˈnɪs trɔrs, ˌsɪn əˈstrɔrs)

adj.
(of a climbing plant) twining counterclockwise from the base.
[1855–60; < Latin sinistrōrsus literally, turned leftward. See sinister, versus]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.sinistrorse - spiraling upward from right to left; "sinistrorse vines"
phytology, botany - the branch of biology that studies plants
sinistral - of or on the left; "a sinistral gastropod shell with the apex upward has its opening on the left when facing the observer"; "a sinistral flatfish lies with the left eye uppermost"
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References in periodicals archive ?
The Rauvolfioideae typically have the corolla lobes sinistrorsely contorted in bud, the anthers are mostly unspecialized and free from the style head, and there is a broad array of fruit and seed types, although the seeds are almost always ecomose.
Corolla rotate to campanulate or urceolate; lobes mostly with dextrorsely contorted or valvate aestivation (but sinistrorsely contorted in Genianthus); corolline corona consisting of 5 fleshy ridges radiating out along inner surface of corolla lobes close to and nearly parallel to margins and meeting in sinuses where they sometimes form pouch.
Corolla 4-5 [-12 (Blackstonia)]-merous; connate, usually with a short to long tube (Tachiadenus), usually plicate at sinuses; occasionally produced into spurs (Halenia); usually convolute, occasionally sinistrorsely contorted (Halenia) or imbricate (Obolaria); often with scales or nectary-pits within; rarely with coronas.