Lycium macrodon
| Lycium macrodon | ||||||||||||
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| Lycium macrodon | ||||||||||||
| A.Gray |
Lycium macrodon is a plant type from the genus of Lycium ( Lycium ) in the family of the nightshade family (Solanaceae).
description
Lycium macrodon is a 1 to 3 m high, rigidly branched shrub that is armed with spines . Its leaves are hairless or only briefly hairy with fine tufts. Their length is 5 to 30 mm, the width 2 to 5 mm.
The flowers are hermaphroditic and five-fold, they are pendulous and occur singly or in pairs. The calyx is bell-shaped and finely hairy glandular. The calyx tube is 4 to 9 mm long, the calyx lobes are 1.5 to twice as long as the calyx tube. The crown is greenish-white to pale purple. The corolla tube is 5 to 12 mm long, the corolla lobes are 2 to 5 mm long. The stamens are hairless to sparsely hairy, at the base they are tomentose in an area up to 4 mm in size.
The fruit is a yellowish to brownish colored berry with a constriction , which is divided into two chambers and reaches a length of 6 to 10 mm. Each chamber contains one or two seeds .
The number of chromosomes is 2n = 24.
Occurrence
The species is widespread in North America and occurs there in the Mexican state of Sonora and in the US state of Arizona .
Systematics
Molecular biological studies place the species together with Lycium cooperi , Lycium pallidum , Lycium puberulum and Lycium shockleyi in a clade that is a sister clade to the genus Grabowskia within the genus Lycium .
proof
Individual evidence
- ^ Lycium macrodon at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
- ^ Rachel A. Levin and Jill S. Miller: Relationships within Tribe Lycieae (Solanaceae): Paraphyly of Lycium and multiple Origins of Gender Dimorphism . In: American Journal of Botany , Volume 92, Number 12, 2005. pp. 2044-2053.
- ^ Rachel A. Levin et al .: Evolutionary Relationships in Tribe Lycieae (Solanaceae) . In: DM Spooner, L. Bohs, J. Giovannoni, RG Olmstead and D. Shibata (eds.): Solanaceae VI: Genomics meets biodiversity. Proceedings of the Sixth International Solanaceae Conference , ISHS Acta Horticulturae 745, June 2007. ISBN 978-9066054271
Main evidence
- JS Miller and RA Levin: Lycium macrodon . In: Project Lycieae