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The Cutting Edge
Volume XXVIII, Number 2, April 2021
News and Notes | Leaps and Bounds
| Germane Literature | Season's Pick | Annotate your copy
CLEOMACEAE. In a roundabout manner, we have been alerted to an oversight in our recently published (2020) treatment of this family. The African sp. Cleome rutidosperma DC. was mentioned near the end of the Cleome genus discussion as a sp. to be expected in Costa Rica, with a footnote (added in press) indicating that it has now been collected there. The foregoing paragraph, enumerating minor genera recently segregated from Cleome by splitters, also invoked the name C. rutidosperma, as being the only sp. treated or mentioned in the Manual that would remain in Cleome sensu stricto under the splitting scenario. But now we know that we were wrong about that: even C. rutidosperma has been exiled to a segregate genus! This was proposed in an article (Roalson & Hall, 2017; Syst. Bot. 42: 925–942) that was actually published in time to have been considered for the Manual, but which was overlooked by us, presumably because of its title ("New generic concepts for African Cleomaceae"). In that paper, C. rutidosperma was assigned to Sieruela Raf., a mainly African "genus" of some 36 spp. "most notably distinguished by purple petals." Manual users should thus add the name Sieruela rutidosperma (DC.) Roalson & J. C. Hall to the synonymy of Cleome rutidosperma (as we ought to have done). It also bears mentioning that the authors of this paper provisionally recognized at least two vars. of Sieruela rutidosperma; vars. were not alluded to in the Manual (although their names exist also under Cleome), but in any case, we do not have enough information immediately at hand to hazard a guess as to which one may be represented in Costa Rica.
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