Chaetanthera kalinae (Mutisieae, Asteraceae), a New Species from Chile Alison M. R. Davies l)epartment Biologie I der LMU Miinchen, Bereich Biodiversitiitsforschung, Systematische Botanik, Menzinger Strale 67, 80638 Munchen, Germany.
[email protected];a'. Chaetanthera kalin.c, a new annualspecies of Chaetanthera Ruix & Pavon, has beendiscovered from the Cordillera de IDona Ana and theSierra dte Tatul del Medio in Chile. This yellow-flowered. pseudorosette-forming species from thesubgenns Ty/llona is described, illustrated, anddiscussed in the context of the morphologically mostsimilar taxa: C. limbata (yellow-flowered, lax annual)and C. lanata( (white-flowered, pseudorosette-formingperennial; suhgenus Carmelita).RlEstuFN. Se describe una nueva especie anual delgenero Chaetanthera Ruiz & Pavin. C. kalinae, de laCordillera de Dolia Ana v la Sierra de Tatul delMedio, Chile. Pertenece al subgenero Trllorna. es dehfbito pseudo-arrosetado y con flores marginalesamarillas. Se da una descripcion con ilustraciones yse discuten aspectos de su morfologia en el contextode los taxones parecidos: C. limbata (planta anual ldehiibito flojo y flores amarillas) y C. lanata (plantaperenne, pseudo-arrosetada y flores blancas: subge-nero Carmelita). Key wiords: Chaetanthera, Chile. Cordillera deDona Ana, Tylloma. The genus Chaetanthera Ruiz & Pavon (Asteraceae,Mutisieae) currently has 42 species distributed overChile, Argentina, Peru, and Bolivia (Iavies & Facher,2001). The center of diversity of the genus lies in thehigh Andes of central Chile, which has a Mediterranean-type climate zone. While studying the genus fora forthcoming revision, material of a distinct newspecies was found mixed in with collections ofChaetanthera glabrata (DC.) F. Meigen and Chae-tanthera limbata (D. Don) Lessing. Recent collectionsmade by M. T. Kalin Arroyo (University of Chile.Santiago) and C. Ehrhart (Ludwig-Maximilians-Uni-versitat Miinchen, Germany) confirmed the status of thematerial as a hitherto undescribed species. Themorphology and habit of this new species places itfirmly in Chaetanthera suhg. Tylloma D. Don. The taxain the subgenus Tylloma represent one of the mostinteresting species associations in Chaetanthera andshow fascinating distribution and speciation patterns,especially in the lowland, coastal taxa. In particular, theindunientum, leaf, and involucral bract morphology canap-pear very polymorphic. Taxolnolically, the morpho-logical variability in the subgenus Tylloma has beenwell documented, if perhaps not well understood(Reiche. 1905; Cabrera, 1937). However. C. kalinae.as a higher-altitude representative of this group, isremnarkably consistent and stable in its characters. Thisis also true for the other high-altitude member of thesuhgentus, C. splendens (Remly) 1. I,. Robinson.Chaetanthera kalinae A. M. R. D)avies. sp. nov. TYPE: Chile. Region de Coquimbo. Prov. de Elqui: StraBe von Vicuna zum Embalse La Laguna. 30'03'S, 70 05'W. 2340 m, 27 Nov. 2002, C. Ehrhart 2002/061 (holotype, MSB; istlypes, CONC, K, MO). Figure 1. I'lanta characteristica suhgenerica Tyllomin. Planta annua hcrliacca, ascendens vel delcutmbenls, ad 8 cm alta. raro ranrm s. 'IFlia pseudopetiolata, larnina spalhulata vel reni-forime ort)iculala. limbata nlarginibus integris. indistincte surl('cicleta. atrogriseo-viridis, dense albo lanata. Capitula radiata foliis superioribus suiirosulatis ornata. [nvolucri l)racltlae interiores oblanceolatae., oiblusae el mucronatae. miembrnanaceae, subglabresceniies apices pallide rosaceae. llores radii et flores disci corolla aurea. Pappi selae ad 10 ini loingae, 1-2 serialae, allidac. basalis longe ciliatae. alicalis abrupte scabridae. Achlnia ad 3.5 mm longa, brunniscentia, laxe vel densa papillosa. Annual monoecious herbs to 8 cm; roots filiform; stems creeping to ascending, decumbent; stems glabrous to sparsely pubescent with white, filiform hairs: stems often buried in substrate; flowering stems originate from a central node a short distance above roots, rarely branched. Cauline leaves few, alternate, forming clusters at nodes and distinct rosettes below capilula with subtle morphological transition to phyllaries surrounding capitula, when dried the leaves recurve strongly and at flowering cauline leaves usually die back; leaves 8-9(13) X 5-6.5 mm, pseudolpetiolate, pseudopetioles 5-7 mm in length, margins of pseudopetioles rarely sparsely dotted with glandular trichomes; lamina spathulate to orbicular-reniform, apices obtuse to obcordate, mucronate, bases subcordate to rounded, lamina slightly succulent,NoVON 16: 51-55. PUBlISHED ON 25 MAY 2006.
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