{"product_id":"isi-2026-haworthia-viscosa","title":"ISI 2026-21 Haworthia viscosa","description":"\u003cp\u003e\u003cspan\u003e ISI 2026-21. \u003cem\u003eHaworthia viscosa\u003c\/em\u003e (L.) Haw. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis is one of the more rigid-leaved members of what was originally considered to constitute the subgenus \u003cem\u003eHexangulares\u003c\/em\u003e. Modern taxonomists have argued for its elevation to generic status as the genus \u003cem\u003eHaworthiopsis\u003c\/em\u003e. However, the flowers are remarkably consistent across subgenera, so retention of these plants in the genus \u003cem\u003eHaworthia\u003c\/em\u003e, which is noted for its variability of leaf form, can be justified, even if DNA evidence supports the distinctness of the subgeneric clades. \u003cem\u003eHaworthia viscosa \u003c\/em\u003eis usually easily distinguished from all other members of the broader genus by the tower-like stems of stacked, three-ranked, rigid leaves. These can be bright green, elongate and forming rather open rosettes, or short and tightly packed. However, within the range of variation are those with dark tuberculate leaves, resembling those of the one other \u003cem\u003eHaworthia \u003c\/em\u003especies with tower-like stacks of three-ranked leaves, namely \u003cem\u003eH. nigra\u003c\/em\u003e. Therefore, the form offered here was, for a time, thought to be misidentified as\u003cem\u003e H. viscosa\u003c\/em\u003e. Consultation with various \u003cem\u003eHaworthia \u003c\/em\u003eauthorities, however, confirms that this is within the range of variability for \u003cem\u003eH. viscosa\u003c\/em\u003e. Unfortunately, we do not have provenance information for this collection to help confirm that placement. Nevertheless, such \u003cem\u003eH. nigra\u003c\/em\u003e look-alike forms of\u003cem\u003e H. viscosa\u003c\/em\u003e are known and the two species are both widespread with broadly overlapping distributions. Divisions of HBG 126408.\u003c\/span\u003e\u003c\/p\u003e","brand":"The Huntington Plant Sales","offers":[{"title":"Default Title","offer_id":47762735694082,"sku":null,"price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/8963\/6866\/files\/Haworthia_viscosa.png?v=1778686480","url":"https:\/\/plantsales.huntington.org\/products\/isi-2026-haworthia-viscosa","provider":"The Huntington Plant Sales","version":"1.0","type":"link"}