Goeppertia 'TWYCA0018'

Goeppertia 'TWYCA0018' is a cultivated hybrid in the family Marantaceae, belonging to the genus Goeppertia Nees — the accepted botanical name for the largest genus in the family, encompassing an estimated 260 species. The genus name was established following the 2012 revision by Borchsenius, Suárez and Prince, published in Systematic Botany 37(3): 620–635, which demonstrated that Calathea G.Mey. as previously circumscribed was polyphyletic and published 246 new combinations transferring its species to Goeppertia [3].

U.S. Plant Patent PP17574, granted 3 April 2007, designates this cultivar under the botanical name Calathea hybrida, which was current nomenclature at the time the patent application was filed in October 2005 — seven years before the Borchsenius, Suárez and Prince revision [1]. No updated botanical designation has been published in the patent record. The registry reflects the accepted genus name Goeppertia in accordance with the 2012 revision, while noting that the primary patent document continues to employ Calathea hybrida throughout [1].

The cultivar is the product of a planned breeding programme conducted by inventor Gregori G. Hambali in Bogor, Indonesia, with the stated objective of producing fast-growing cultivars with a freely branching habit and attractive leaf colouration [1]. It is distinguished in the patent claim by three primary characters: an upright and outwardly spreading growth habit; a freely basally branching habit; and elliptic leaves bearing alternating dark and light green chevrons with double-ringed dark green margins [1].

The registry records two names for this cultivar, both carrying the string 'TWYCA0018', but belonging to distinct name classes under the International Code of Nomenclature for Cultivated Plants (ICNCP) and U.S. patent law respectively.

The cultivar epithet is 'TWYCA0018'. Under the ICNCP, a cultivar epithet is enclosed in single quotation marks when used in conjunction with the botanical or genus name, giving the form Goeppertia 'TWYCA0018'. No International Cultivar Registration Authority has been appointed for Marantaceae. The International Society for Horticultural Science maintains a list of appointed registration authorities by family and genus; Marantaceae does not appear on that list [4]. Because no such authority exists for this family, no formal ICNCP registration has been or could be recorded for this cultivar.

The patent denomination is also 'TWYCA0018', as published in U.S. Plant Patent PP17574, granted 3 April 2007 [1]. A patent denomination is the name used to identify an invention in a legal instrument and is a distinct name class from an ICNCP cultivar epithet, even when — as here — the two strings are identical. The registry records both classes separately on that basis.

No trade designation — that is, a marketing name separate from the cultivar epithet — appears anywhere in the text of U.S. Plant Patent PP17574 [1]. The patent is silent on any trade designation, and no authoritative source for one has been located. No trade designation is established for this cultivar.

U.S. Plant Patent PP17574 names Gregori G. Hambali as sole inventor and originator; no co-inventor is named in the patent record [1]. The patent records the breeding programme as conducted in Bogor, Indonesia.

The parentage is stated in the patent as follows. The cross-pollination was made by the inventor in February 1999 in Bogor, Indonesia. The female (seed) parent was an unnamed selection of Calathea loesenerii × Calathea illustris, described in the patent as not patented. The male (pollen) parent was an unnamed selection of Calathea libbyana, also described as not patented [1]. All three parent designations are given in their Calathea form, which was accepted nomenclature at the time of application; the same species belong to the group transferred to Goeppertia by the 2012 Borchsenius, Suárez and Prince revision [3].

The cultivar was discovered and selected by the inventor as a single plant within the progeny of the stated cross-pollination in a controlled environment in Bogor, Indonesia, in October 2001 [1]. The patent application was filed on 6 October 2005, and the patent was granted on 3 April 2007 [1]. Asexual reproduction by divisions was subsequently carried out in a controlled environment in Bogor, Indonesia, and the patent states that the distinguishing features were found to be stable and reproduced true to type in successive generations [1].

The primary intellectual property instrument governing 'TWYCA0018' is U.S. Plant Patent PP17574P2, filed on 6 October 2005 (application number US11/245,378) and granted on 3 April 2007 [1]. The patent was issued by the United States Patent and Trademark Office under the botanical designation Calathea hybrida.

U.S. plant patents carry a statutory term of 20 years from the filing date under 35 U.S.C. § 163. A patent filed on 6 October 2005 would therefore reach the end of its statutory term on or around 6 October 2025. The Google Patents record for PP17574P2 shows the legal status as Expired – Lifetime [2]. The registry holds the patent_expires_on field as null; the legal status recorded in the patent file indicates that expiry has occurred, and the registry field requires review against the full USPTO record before it can be populated. This is a documented conflict between the registry and the primary record; a human reviewer should confirm and populate the field.

The assignment history documented in the patent record proceeds from Twyford International Inc. (original applicant and assignee at the time of application) to LPCDM B.V.B.A. (intermediate assignee) and subsequently to Exotic Plant B.V.B.A. (current assignee as recorded in the patent file) [2]. No record of any additional territorial patents, plant variety protection certificates, or other intellectual property instruments for 'TWYCA0018' has been located in the sources searched for this brief.

The distinguishing characteristics of 'TWYCA0018' are set out in U.S. Plant Patent PP17574 and constitute the primary record of the cultivar's defining characters [1]. The patent claim identifies three primary distinguishing characteristics: an upright and outwardly spreading growth habit; a freely basally branching habit; and elliptic-shaped leaves bearing alternating dark and light green-coloured chevrons with double-ringed dark green-coloured margins [1].

The detailed botanical description in the patent body records quantitative measurements of leaf dimensions and petiole length, and colouration references calibrated to the Royal Horticultural Society Colour Chart [1]. Those measurements and colour references are reproduced in full only in the patent document itself. The patent states that 'TWYCA0018' was selected as a single plant from within the progeny of the stated cross-pollination on the basis of its conformance with the breeding objectives, and that asexual propagation by divisions in a controlled environment in Bogor, Indonesia, demonstrated that these characters are stable through successive generations [1].

No botanic garden publication, university extension record, or peer-reviewed horticultural literature specifically documenting this cultivar's performance in cultivation has been located in the sources searched for this brief. Limited authoritative sources available; further research needed.

The sole authoritative document in the public record for Goeppertia 'TWYCA0018' is U.S. Plant Patent PP17574P2, available as a primary record from the United States Patent and Trademark Office [1] and confirmed independently through the Google Patents bibliographic record [2]. These two sources establish the inventor, parentage, breeding location, selection date, filing date, grant date, assignment history, and the full botanical description including the patent claim.

No International Cultivar Registration Authority has been appointed for Marantaceae [4]. The International Society for Horticultural Science maintains a list of appointed registration authorities; Marantaceae does not appear on that list. Because no ICRA exists for this family, no formal ICNCP registration has been or could be recorded for 'TWYCA0018'. Digital Towns is an applicant to serve in a registration function for this family and holds no affiliation with, endorsement from, or appointment by the ISHS or any currently appointed cultivar registration authority.

The accepted genus-level taxonomy, placing this cultivar in Goeppertia Nees rather than Calathea G.Mey., follows the 2012 revision of Borchsenius, Suárez and Prince in Systematic Botany 37(3): 620–635 [3]. The absence of an appointed ICRA for Marantaceae is a documented condition of the family's registration infrastructure and applies equally to all cultivated taxa within it, including the body of Goeppertia hybrids originally patented under the Calathea name by Twyford International Inc. and associated entities [4].