View source for Pterolobium

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Pterolobium (Greek, wing and pod; the pods are produced into a wing at the extremity). Legu- minosae. Woody climbers having the habit of Caesal- pinia, from which they differ only in the pod: lvs. bipin- nate; lfts. small, numerous; stipules small or inconspicuous: fls. small, white, racemose, the racemes in lax panicles at the tips of the branches; calyx deeply cleft, lobes imbricated; petals spreading, oblong and clawed; stamens 10, free, declinate; ovary sessile, 1-ovuled: pod indehiscent, with a large horny oblique wing. About 7 species in the tropics of the Old World. P. indicum, A. Rich. (Caesalpinia lacerans, Roxbg.). Branches slender, finely downy and with minute prickles: lvs. alternate with 8-16 pinnae, 12-16 lfts., pale green: racemes copiously panicled at the end of the branches; calyx with the lowest sepal longest; corolla yellow, not showy. Old World tropics.—Has been intro. into England and is occasionally cult., the treatment being the same as that given Caesalpinia. The species varies in the size of the lvs. and in the width and size of the wing of the pod.
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