Swertiinae

• Overview
• Taxonomy
• Genera
• Footnotes
• Sources

Overview

Taxonomy

The Subtribe Swertiinae is further organized into finer groupings including:

• Genus (13): Bartonia · Comastoma · Frasera · Gentianella · Gentianopsis · Halenia · Jaeschkea · Latouchea · Lomatogonium · Megacodon · Obolaria · Pterygocalyx · Veratrilla
• Species: ZipcodeZoo has pages for 624 species, subspecies, varieties, forms, and cultivars in the Subtribe Swertiinae.

Genera

Bartonia

Bartonia is a genus of the Gentian family (Gentianaceae), tribe , subtribe Swertiinae. Members of this genus are called screwstems. Bartonia was also the name of a genus in the Loasaceae family, but all of those "Bartonia" species are now generally classified under the genus Mentzelia. [more]

Comastoma

Herbs annual with fibrous rootlets or perennial with short rhizomes. Stems branched from base (simple in C. disepalum). Inflorescences racemelike, sometimes reduced to a solitary terminal flower. Flowers 4 or 5merous. Calyx lobed nearly to base, without an intracalycular membrane. Corolla tubular, tubular-funnelform, or salverform; lobes each with 1 or 2 basal scales; scales fringed with nonvascularized white fimbriae; plicae absent. Nectaries at base of corolla tube. Stamens inserted on corolla tube; filaments white. Capsules 2valved, many seeded. Seed coat smooth.^[1] [more]

Frasera

[more]

Gentianella

Gentianella (Dwarf gentian) is a plant genus in the Gentian family (Gentianaceae). [more]

Gentianopsis

Herbs annual, biennial [or perennial]. Roots slender, fibrous. Stems subquadrangular. Flowers terminal, solitary, 4-merous; flower bud slightly flattened, 4-angled. Calyx tubular-campanulate, with triangular discontinuous intracalycular membranes, 2 outer calyx lobes narrower than and basally overlapping 2 inner lobes. Corolla tubular-campanulate to funnelform, lobes frequently toothed to fringed, plicae absent. Nectaries on corolla tube. Stamens inserted on corolla tube; anthers yellow. Capsules 2-valved, many seeded. Seeds angular-papillate.^[2] [more]

Halenia

Halenia is a genus of plant in family Gentianaceae. It contains the following species (but this list may be incomplete): [more]

Jaeschkea

Herbs annual. Inflorescences terminal and axillary clusters, often forming panicles, sometimes 1-flowered. Flower 4- or rarely 5-merous. Calyx lobed nearly to base. Corolla valvate at base of lobes, apically lobes often folded on 1 side and appearing imbricate, tubular, lobed to middle, plicae absent. Nectaries at base of corolla tube. Stamens inserted at 1 side of base of each corolla lobe, alternating with corolla lobes; filaments very short. Style short. Capsules 2valved, few seeded. Seeds smooth.^[3] [more]

Latouchea

Herbs perennial, rhizomatous. Basal leaves in a well-developed rosette; blades mostly over 5 cm. Stem leaves in 1-3 pairs below inflorescence. Inflorescences formed by flowers in groups of (2 or) 3, partly in a terminal umbel-like cluster surrounded by whorl of 4 bracts, also in axil of bracts to form apparent whorls of (4-) 6 flowers. Flowers 4merous. Calyx lobed nearly to base. Corolla campanulate, lobed to middle, plicae absent. Stamens inserted at sinus between corolla lobes. Ovary incompletely 2celled. Style slender, distinct; stigma 2lobed. Nectaries in a whorl at base of ovary. Capsules distinctly curved, often with a long beaklike persistent style, many seeded. Seeds ± fusiform, wingless; seed coat longitudinally rugose.^[4] [more]

Lomatogonium

Lomatogonium is a genus of 18 species in the family Gentianaceae, found in cool temperate to subarctic regions of Asia, with two species (L. carinthiacum, L. rotatum) also in Europe and one species (L. rotatum) also in North America. By far the highest diversity is in China, with 16 species. [more]

Megacodon

Herbs perennial. Roots stout, slightly fleshy. Stems erect, terete, stout, 1-1.5 cm in diam. at base, striate, simple. Basal leaves 2-4 pairs, small, membranous. Middle to upper stem leaves larger than lower leaves, herbaceous, base obtuse to rounded and subamplexicaul. Inflorescences a thyrse. Pedicel subtended by 2 bracts. Flowers large, nodding, 5merous, with 2 bracts at base of pedicel. Pedicel slightly nodding, elongated in fruit. Calyx campanulate, lobed to below middle. Corolla campanulate, lobed to below middle; lobes with distinct reticulate veins; plicae absent. Stamens inserted at middle of corolla tube; filaments flattened; anthers ellipsoid. Ovary 1celled. Style stout; stigma 2lobed. Nectaries in a whorl on gynophore. Capsules 2valved, many seeded. Seeds light brown, ellipsoid, wingless.^[5] [more]

Obolaria

[more]

Pterygocalyx

Perennials. Stems twining. Leaves opposite. Flowers 4-merous. Calyx campanulate, tube strongly 4-winged. Corolla tubular, plicae between lobes absent. Stamens inserted on corolla tube. Nectaries at base of ovary, sometimes absent. Capsules 2-valved, many seeded. Seed coat alveolate.^[6] [more]

Veratrilla

Herbs perennial, dioecious. Roots stout, obconic, slightly fleshy. Caudex sheathed by blackish remains of old petioles. Vegetative stems short with a rosette of leaves; flowering stems erect, stout, terete, striate, simple. Basal leaves petiole slender; leaf blade oblong-spatulate, base narrowed, apex obtuse to rounded, veins 3-5. Stem leaves sessile, smaller toward apex, base rounded and subamplexicaul, apex obtuse, veins 3-5. Inflorescences panicles of cymes with many small flowers, rounded in male plants, narrower and ± elongated in female plants. Flowers 4merous. Calyx and corolla rotate, lobed nearly to base; each corolla lobe with 1 or 2 gland patches. Stamens inserted at sinus between corolla lobes. Ovary 1celled. Style short. Capsules 2valved, many seeded. Seeds small, discoid winged.^[7] [more]

At least 3 species and subspecies belong to the Genus Veratrilla.

More info about the Genus Veratrilla may be found here.

Footnotes

1. "Comastoma". in Flora of China Vol. 16 Page 132. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
2. "Gentianopsis". in Flora of China Vol. 16 Page 130. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
3. Ting-nung Ho & James S. Pringle "Jaeschkea". in Flora of China Vol. 16 Page 138. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
4. Ting-nung Ho & James S. Pringle "Latouchea". in Flora of China Vol. 16 Page 98. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
5. "Megacodon". in Flora of China Vol. 16 Page 99. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
6. "Pterygocalyx". in Flora of China Vol. 16 Page 6. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.
7. "Veratrilla". in Flora of China Vol. 16 Page 100. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org.

Sources

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