40,615 research outputs found
A revision of the indusiate scaly tree ferns (Cyatheaceae, Cyathea subgen. Alsophila sect. Alsophila) in Madagascar, the Comoros and the Seychelles
No full textBased on the examination of herbarium specimens including numerous recent collections and on observations of most species in situ, we herein present a revision of the indusiate scaly tree ferns (Cyathea sect. Alsophila) for Madagascar, the Comoros and the Seychelles. One endemic species Occurs on the Seychelles and three taxa (one endemic) are found on the Comoros. For Madagascar, we describe 55 taxa (40 species and 15 varieties), 5 1 of which arc endemic. Among these, 11 species and 12 varieties are new. The species newly described for Madagascar comprise C basirotundata Rakotondr. & Janssen, C. conferta Janssen & Rakotondr., C. dilatata Rakotondr. & Janssen, C. emilei Janssen & Rakotondr., C hebes Janssen & Rakotondr., C lisiae Janssen & Rakorondr., C. longispina Janssen & Rakotondr., C. meridionalis Janssen & Rakotondr., C. obtecta Rakotondr. &,Janssen, C. pseudo-bellisquamata Janssen & Rakotondr., and C valdesquamata Janssen & Rakotondr. The newly described varieties are C acutula (R.M. Tryon) Janssen & Rakotondr. var. deltoidea Janssen & Rakotondr., C a. var. rufescens Janssen & Rakotondr., C. bellisquamata Bonap. var. ambrensis Janssen & Rakorondr., C. b. var. australisJanssen & Rakotondr., C boivinii Mett. ex Kuhn var. andringitrensis Janssen & Rakotondr., C A var. bevolo Janssen & Rakotondr., C A var. parahildebrandtii Janssen & Rakotondr., C decrescens Mett. ex Kuhn var. cristata Janssen & Rakotondr., C d. var. manongarivensis Janssen & Rakotondr., C. emilei var. dauphinensis Janssen & Rakotondr., C. similis C.Chr. var. leptoderma Rakotondr. & Janssen, and C s. var. montana Janssen & Rakotondr. The descriptions of previously recognized taxa have been completed and where necessary corrected. Especially such characters have been added, that can be observed only in situ, e.g. trunk morphology and measurements of the entire leaf Descriptions are accompanied by plates with detailed illustrations and by distribution maps. We thoroughly reviewed the nomenclatural status and typification of all names. We provide determination keys down to the varietal level including all taxa of Cyatheaceae of the Madagascan region. Photographic documentation of the trunk and habit of most species will facilitate determination in the field. Finally, we briefly comment on the distribution of the tree fern diversity in the Madagascan rainforests
A revision of the indusiate scaly tree ferns (Cyatheaceae, Cyathea subgen. Alsophila sect. Alsophila) in Madagascar, the Comoros and the Seychelles
No full textBased on the examination of herbarium specimens including numerous recent collections and on observations of most species in situ, we herein present a revision of the indusiate scaly tree ferns (Cyathea sect. Alsophila) for Madagascar, the Comoros and the Seychelles. One endemic species Occurs on the Seychelles and three taxa (one endemic) are found on the Comoros. For Madagascar, we describe 55 taxa (40 species and 15 varieties), 5 1 of which arc endemic. Among these, 11 species and 12 varieties are new. The species newly described for Madagascar comprise C basirotundata Rakotondr. & Janssen, C. conferta Janssen & Rakotondr., C. dilatata Rakotondr. & Janssen, C. emilei Janssen & Rakotondr., C hebes Janssen & Rakotondr., C lisiae Janssen & Rakorondr., C. longispina Janssen & Rakotondr., C. meridionalis Janssen & Rakotondr., C. obtecta Rakotondr. &,Janssen, C. pseudo-bellisquamata Janssen & Rakotondr., and C valdesquamata Janssen & Rakotondr. The newly described varieties are C acutula (R.M. Tryon) Janssen & Rakotondr. var. deltoidea Janssen & Rakotondr., C a. var. rufescens Janssen & Rakotondr., C. bellisquamata Bonap. var. ambrensis Janssen & Rakorondr., C. b. var. australisJanssen & Rakotondr., C boivinii Mett. ex Kuhn var. andringitrensis Janssen & Rakotondr., C A var. bevolo Janssen & Rakotondr., C A var. parahildebrandtii Janssen & Rakotondr., C decrescens Mett. ex Kuhn var. cristata Janssen & Rakotondr., C d. var. manongarivensis Janssen & Rakotondr., C. emilei var. dauphinensis Janssen & Rakotondr., C. similis C.Chr. var. leptoderma Rakotondr. & Janssen, and C s. var. montana Janssen & Rakotondr. The descriptions of previously recognized taxa have been completed and where necessary corrected. Especially such characters have been added, that can be observed only in situ, e.g. trunk morphology and measurements of the entire leaf Descriptions are accompanied by plates with detailed illustrations and by distribution maps. We thoroughly reviewed the nomenclatural status and typification of all names. We provide determination keys down to the varietal level including all taxa of Cyatheaceae of the Madagascan region. Photographic documentation of the trunk and habit of most species will facilitate determination in the field. Finally, we briefly comment on the distribution of the tree fern diversity in the Madagascan rainforests
FIG. 7 in A revision of the fern family Cyatheaceae in the Mascarene Islands
No full textFIG. 7. — Photographic documentation of field characters: habit (A-E), shoot apex (A'-E'), and trunk surface at breast height (A"- E") are shown for each species; A-A", Cyathea glauca Bory; B-B", C. excelsa Sw.; C-C", C. borbonica Desv. var. borbonica; D- D", C. grangaudiana Th.Janssen & Rakotondr.; E-E", C. borbonica var. latifolia (Hook.) Bonap. A, uncollected; A', Janssen et al. 2728; A", Janssen et al. 2686; B, B', Janssen et al. 2700; B", uncollected; C, uncollected; C', Janssen et al. 2670; C", Janssen et al. 2726; D, uncollected; D', Janssen et al. 2738; D", Janssen et al. 2740; E, E', Janssen et al. 2746; E", Janssen et al. 2743. Vouchers at P. Scale bars: A-E, 1 m; A'-E', A"-E", 10 cm.Published as part of Janssen, Thomas & Rakotondrainibe, France, 2006, A revision of the fern family Cyatheaceae in the Mascarene Islands, pp. 213-241 in Adansonia (3) 28 (2) on page 237, DOI: 10.5281/zenodo.518690
Thomas Grisell letter to Thomas Rotch, 2nd mo 19th 1823
No full textThomas Grisell's letter reached the Rotch household several months before the unexpected death of Thomas Rotch in August, 1823. This is the last letter of the series and presumably the author learned of his friend's death before another letter was penned. 7.95" x 10" (20.2 by 25.5 cm
Replication Data for: Wood allocation trade‐offs between fiber wall, fiber lumen, and axial parenchyma drive drought resistance in neotropical trees
No full textThis dataset contains the replication data for: Wood allocation trade‐offs between fiber wall, fiber lumen, and axial parenchyma drive drought resistance in neotropical trees, published in Plant Cell and Environmen
Replication Data for: Drought effects on leaf fall, leaf flushing and stem growth in the Amazon forest; reconciling remote sensing data and field observations
No full textThis dataset contains the stem growth and leaf litterfall data from "Drought effects on leaf fall, leaf flushing and stem growth in the Amazon forest; reconciling remote sensing data and field observations
Replication Data for: Wood allocation trade‐offs between fiber wall, fiber lumen, and axial parenchyma drive drought resistance in neotropical trees
No full textThis dataset contains the replication data for: Wood allocation trade‐offs between fiber wall, fiber lumen, and axial parenchyma drive drought resistance in neotropical trees, published in Plant Cell and Environmen
Replication Data for: Drought resistance increases from the individual to the ecosystem level in highly diverse Neotropical rainforest: a meta-analysis of leaf, tree and ecosystem responses to drought
No full textThis file contains the replication data for: Drought resistance increases from the individual to the ecosystem level in highly diverse Neotropical rainforest: a meta-analysis of leaf, tree and ecosystem responses to drought, published in Biogeoscience
Replication Data for: Drought resistance increases from the individual to the ecosystem level in highly diverse Neotropical rainforest: a meta-analysis of leaf, tree and ecosystem responses to drought
No full textThis file contains the replication data for: Drought resistance increases from the individual to the ecosystem level in highly diverse Neotropical rainforest: a meta-analysis of leaf, tree and ecosystem responses to drought, published in Biogeoscience
FIG. 1 in An update of the revision of Cyathea subgen. Alsophila sect. Gymnosphaera (Cyatheaceae) in Madagascar and the Comoros including a discussion of putative hybridization events
No full textFIG. 1. — Photographic documentation of field characters: habit (A-E), and shoot apex (A'-E') are shown for each species; A, A', Cyathea andohahelensis (Tardieu) Rakotondr.; B, B', C. boiviniiformis Rakotondr.& Janssen s.l.; C, C', C. poolii (C.Chr.) Domin; D, D', C. impolita Rakotondr. & Janssen; E, E', C. rouhaniana Rakotondr. & Janssen; F, C. alticola (Tardieu) Rakotondr., habit; G, trunk surfaces in sect. Gymnosphaera are more or less uniform and typically covered by persistent petiole bases like in C. boiviniiformis (left) and C. impolita with the petiole bases partly removed (right). A, A', Rakotondrainibe et al. 4185; B, Janssen et al. 2844; B', Rakotondrainibe et al. 2061; C, Janssen et al. 2846; C', uncollected; D, D', Janssen et al. 2592; E, E', uncollected; F, Rakotondrainibe et al. 3686; G, left, uncollected; right, Janssen et al. 2596. Vouchers at P. Scale bars: A-F, 1 m; A'-E', G, 10 cm. Photos D, D', E, G (right) by G. Rouhan, MNHN.Published as part of Janssen, Thomas & Rakotondrainibe, France, 2007, An update of the revision of Cyathea subgen. Alsophila sect. Gymnosphaera (Cyatheaceae) in Madagascar and the Comoros including a discussion of putative hybridization events, pp. 195-213 in Adansonia (3) 29 (2) on page 199, DOI: 10.5281/zenodo.518740
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