a.1.(Bot.) Having two little bags, sacs, or pouches.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The recovered palynoflora was consisted of greater proportion of bisaccate pollen.
The gymnospems were mainly integrated Inaperturopollenites and bisaccate pollen grains related to Cupressaceae-Taxodiaceae and Pinaceae, respectively.
Palynological evidence from the May Point area (Nunez-Betelu, 1994) indicates the presence of abundant and diverse conifers, including both the small, thin-walled non-saccate pollen from species such as Parataxodium and Metasequoia and bisaccate pollen, produced by species such as Pinus, Picea, and Abies.
Palynological assemblages from the Sardhai Formation in the Salt and Khisor ranges of Pakistan have yielded abundant bisaccate pollen and few spores.
This produces one (monosaccate, in some fossil forms), two (bisaccate, the most common condition) or three (trisaccate, e.g., Dacrycarpus) outgrowths.
bisaccate (own) and trisaccate (foreign--Dacrycarpus) in Podocarpus cones so the mechanism has only limited exclusion possibilities.
3 a-b) and several specimens of the bisaccate gymnosperm pollen Rugubivesiculites reductus (Fig.
Present paper deals with only few bisaccate pollen viz Protohaploxipinus goraiensis, Protohaploxypinus varius, Protohaploxypinus limpidus, Protohaploxypinus amplus, Protohaploxypinus microcorpus, Striatopodocarpites raniganjensis, Striatopodocarpites cancellatus, Stroiatopodocarpites rarus, Striatopodocarpites pantii, Striatoabieites elongatus, Striatoabieites multistriatus, Striatoabieites striatus, Lunatisporites novialensis, Lunatisporites pellucidus, Guttulapollenites hannonicus and Hamiapollenites bullaeformis.
Keywords: Bisaccate pollen, Chhidru formation, salt range, palynomorphs
Samples 1349 (Verbios section) and 1410 (Abiada Section), showed similar assemblages (Table 1) with high percentages of bisaccate pollen grains (73.36% and 76.11%, respectively), and small amounts of circumpolles (13.57% and 17.32%, respectively) and inaperturate (12.27% and 5.51%, respectively) grains.
4e) and undetermined bisaccate pollen grains and circumpolles.
The bisaccate pollen of many conifers occurs as well in both Paleozoic and Mesozoic seed ferns, and the pycnoxylic wood typical of the group is also found in ginkgos and many fossil groups beginning with the progymnosperms.