Barthelia furcata
species
Holotype: OUPH specimen M-1614
Paratypes: OUPH specimens M-1421, M-1073, M-485; DPNHMBRCKU specimens ESU5981, ESU5928, ESU5931, ESU6007, ESU6025, and ESU6032.
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species
Holotype: OUPH specimen M-1614
Paratypes: OUPH specimens M-1421, M-1073, M-485; DPNHMBRCKU specimens ESU5981, ESU5928, ESU5931, ESU6007, ESU6025, and ESU6032.
genus
type species: Barthelia furcata Rothwell & Mapes, 2001
Leaves 1.0-4.7 cm long; simple leaves 1.0-2.5 cm; forked leaves 2.2-4.7 cm, angle of fork ranging from 20º to 120º. Stems with septate pith comprising sclerotic nests and parenchyma cells; axillary elongated resin rodlets with dark contents in secondary phloem and cortex; epidermis with isodiametric polygonal epidermal cells and elongated trichomes. Long marginal trichomes at leaf base, diminishing to short spines near apex, surficial trichomes elongated and prominent on midrib. Pollen cones 2.0-2.3 cm wide, >7 cm long, prepollen with bent monolete, 103-152 µm in greatest dimension.
Irregularly branched plants with helically arranged leaves, bracts, and sporophylls; smaller leaves simple, larger leaves forked. Leaf cushions absent; bud scales absent; Endarch eustele with dense wood; leaves with two adaxial stomatiferous bands flanking inflated midrib; marginal and surficial trichomes present. Stomata longitudinally oriented, solitary or arranged in longitudinal rows; stomatal complexes with ring of angular papillate subsidiary cells, polar subsidiary cells elongated. Microsporangiate sporophylls with forked tip; prepollen monolete.