Dasypogonaceae

Taxonomy

Family name: Dasypogonaceae Dumort.

Synonym(s): Baxteriaceae Takht.; Calectasiaceae Schnizl.; Kingiaceae Endl. ex Schnizl.

Common name(s): dasypogon family

*Number of genera/species: 4/16

List of genera records in GRIN-Global

Disseminule

fruit or rarely, seed

Description

Fruit an acheneachene:
a dry, indehiscent, one-seeded fruit, with seed attached to pericarp at a single point, derived from a single, superior, simple or compound, one-loculed ovary
, rarely loculicidalloculicidal:
type of capsular dehiscence, opening longitudinally through the locules (compare septicidal)
and septicidalsepticidal:
type of capsular dehiscence, opening longitudinally by separating between the septa of adjacent carpels
capsulecapsule:
a dry, dehiscent fruit derived from a compound ovary
with explosive dehiscence (Baxteria), up to 15 mm long, ovoidovoid:
3D shape—ovate
, tereteterete:
approximately circular in cross section; width and thickness approximately equal
or triangulartriangular:
2D shape—three relatively straight sides with distinct corners; more angular than teardrop-shaped
in transection. AchenesAchene:
a dry, indehiscent, one-seeded fruit, with seed attached to pericarp at a single point, derived from a single, superior, simple or compound, one-loculed ovary
one seeded with persistent hardened perianthperianth:
collective term for calyx and corolla of a flower
. CapsulesCapsule:
a dry, dehiscent fruit derived from a compound ovary
less than 10-seeded. Pericarppericarp:
fruit wall or fruit coat
brown, glabrousglabrous:
without hairs
or pubescentpubescent:
surface relief—bearing hairs
, smooth.

Seeds globoseglobose:
3D shape—more or less spherical
or oblongoblong:
2D shape—much longer than broad with nearly parallel sides, corners are rounded
, tereteterete:
approximately circular in cross section; width and thickness approximately equal
in transection, 2–4.5 mm long. Seed coat yellow to brown.

Embryo small, lens-shapedlens-shaped:
2D shape—round and flattened with two curved (convex) surfaces
or broad, curvedcurved:
(of embryo) linear embryo is curved into an arch or horseshoe with the ends far apart
or straight, basalbasal:
at or pertaining to the point of attachment; (of embryo) embryo occupies one end of the seed
.

Endosperm copious.

Identification features

Fruit
Type	acheneachene: a dry, indehiscent, one-seeded fruit, with seed attached to pericarp at a single point, derived from a single, superior, simple or compound, one-loculed ovary , loculicidalloculicidal: type of capsular dehiscence, opening longitudinally through the locules (compare septicidal) and septicidalsepticidal: type of capsular dehiscence, opening longitudinally by separating between the septa of adjacent carpels capsulecapsule: a dry, dehiscent fruit derived from a compound ovary
Size range	15 mm long
Shape(s)	ovoidovoid: 3D shape—ovate
Surface relief	smooth
Color(s)	brown
Unique features	AchenesAchene: a dry, indehiscent, one-seeded fruit, with seed attached to pericarp at a single point, derived from a single, superior, simple or compound, one-loculed ovary with persistent hardened perianthperianth: collective term for calyx and corolla of a flower . Or, few seeded, smooth, capsulescapsule: a dry, dehiscent fruit derived from a compound ovary sometimes pubescentpubescent: surface relief—bearing hairs .
Seed
Size range	2–4.5 mm long
Shape(s)	globoseglobose: 3D shape—more or less spherical , oblongoblong: 2D shape—much longer than broad with nearly parallel sides, corners are rounded
Other
Embryo	small, lens-shapedlens-shaped: 2D shape—round and flattened with two curved (convex) surfaces or broad, curvedcurved: (of embryo) linear embryo is curved into an arch or horseshoe with the ends far apart or straight, basalbasal: at or pertaining to the point of attachment; (of embryo) embryo occupies one end of the seed .
Nutritive tissue	endosperm copious

Distribution

Southwestern Australia.

Distribution map courtesy of Angiosperm Phylogeny Website.

References

Baskin and Baskin 2021Baskin and Baskin 2021:
Baskin C and Baskin J. 2021. Relationship of the lateral embryo (in grasses) to other monocot embryos: A status up-grade. Seed Science Research 31 (3): 199-210. doi:10.1017/S0960258521000209; Dahlgren et al. 1985Dahlgren et al. 1985:
Dahlgren RMT, Clifford HT, and Yeo PF. 1985. The families of the monocotyledons: structure, evolution, and taxonomy. Springer-Verlag, Berlin. 520 pp.; Kirkbride et al. 2006Kirkbride et al. 2006:
Kirkbride JH, Jr, Gunn CR, and Dallwitz MJ. 2006. Family guide for fruits and seeds, vers. 1.0. Accessed September 2020-January 2022. URL: https://nt.ars-grin.gov/seedsfruits/keys/frsdfam/index.cfm .; Kubitzki et al. 1990+Kubitzki et al. 1990+:
Kubitzki K et al., eds. 1990+. The families and genera of vascular plants. 7+ vols. Berlin etc.; Rudall and Conran 2012Rudall and Conran 2012:
Rudall PJ and Conran JG. 2012. Systematic placement of Dasypogonaceae among commelinid monocots: evidence from flowers and fruits. Botanical Review 78 (4): 398-415. https://www.jstor.org/stable/41809860; Stevenson and Loconte 1995Stevenson and Loconte 1995:
Stevenson DW and Loconte H. 1995. A cladistic analysis of monocot families. In: Rudall PJ, Cribb PJ, Cutler DF, and Humphries CJ, eds. Monocotyledons: Systematics and Evolution. Royal Botanic Gardens, Kew.

*The number of genera and species is based on Christenhusz and Byng 2016Christenhusz and Byng 2016:
Christenhusz MJM and Byng JW. 2016. The number of known plant species in the world and its annual increase. Phytotaxa 261 (3): 201-217. https://doi.org/10.11646/phytotaxa.261.3.1, which may differ from the number of genera in GRIN-Global.