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Humboldtia
Seed, cotyledon, embryo, and testa: H. laurifolia M.H. Vahl - left cotyledon notched and concealing all but tip of radicle (L) and embryonic axis (R), bottom far left seed topography, bottom left center seeds, testa SEMs. Seed, cotyledon, embryo, and testa: H. laurifolia M.H. Vahl - left cotyledon notched and concealing all but tip of radicle (L) and embryonic axis (R), bottom far left seed topography, bottom left center seeds, testa SEMs.
Humboldtia
Seed, cotyledon, embryo, and testa: H. laurifolia M.H. Vahl - left cotyledon notched and concealing all but tip of radicle (L) and embryonic axis (R), bottom far left seed topography, bottom left center seeds, testa SEMs.
Fruit and seed: H. drepanocephalus (E.G. Baker) P.A. Duvigneaud - center fruit (modified from Gillett et al., 1971); H. spp. - left articles and fruits concealed in bracts and right seeds. Fruit and seed: H. drepanocephalus (E.G. Baker) P.A. Duvigneaud - center fruit (modified from Gillett et al., 1971); H. spp. - left articles and fruits concealed in bracts and right seeds.
Humularia
Fruit and seed: H. drepanocephalus (E.G. Baker) P.A. Duvigneaud - center fruit (modified from Gillett et al., 1971); H. spp. - left articles and fruits concealed in bracts and right seeds.
Cotyledon, embryo, and testa: H. chevalieri (E.A.J. De Wildeman) P.A. Duvigneaud - embryo, cotyledons, and testa SEMs. Cotyledon, embryo, and testa: H. chevalieri (E.A.J. De Wildeman) P.A. Duvigneaud - embryo, cotyledons, and testa SEMs.
Humularia
Cotyledon, embryo, and testa: H. chevalieri (E.A.J. De Wildeman) P.A. Duvigneaud - embryo, cotyledons, and testa SEMs.

Cotyledon, embryo, and testa: H. ehrenbergii (F.R.R. Schlechter) H.A.T. Harms - embryo, cotyledons, and testa SEMs. Cotyledon, embryo, and testa: H. ehrenbergii (F.R.R. Schlechter) H.A.T. Harms - embryo, cotyledons, and testa SEMs.
Hybosema
Cotyledon, embryo, and testa: H. ehrenbergii (F.R.R. Schlechter) H.A.T. Harms - embryo, cotyledons, and testa SEMs.
Fruit and seed: H. ehrenbergii (F.R.R. Schlechter) H.A.T. Harms - valves and seeds. Fruit and seed: H. ehrenbergii (F.R.R. Schlechter) H.A.T. Harms - valves and seeds.
Hybosema
Fruit and seed: H. ehrenbergii (F.R.R. Schlechter) H.A.T. Harms - valves and seeds.
Fruit and seed: H. corymbosa (W.P. Rich) - center fruit cluster; H. marginata (G. Bentham) R.C. Barneby & J.W. Grimes - top fruit, bottom right seed, bottom left fruit cluster. Fruit and seed: H. corymbosa (W.P. Rich) - center fruit cluster; H. marginata (G. Bentham) R.C. Barneby & J.W. Grimes - top fruit, bottom right seed, bottom left fruit cluster.
Hydrochorea
Fruit and seed: H. corymbosa (W.P. Rich) - center fruit cluster; H. marginata (G. Bentham) R.C. Barneby & J.W. Grimes - top fruit, bottom right seed, bottom left fruit cluster.
Cotyledon and embryo: H. corymbosa (W.P. Rich) - left embryo and cotyledons; H. marginata (G. Bentham) R.C. Barneby & J.W. Grimes - right embryo and cotyledons. Cotyledon and embryo: H. corymbosa (W.P. Rich) - left embryo and cotyledons; H. marginata (G. Bentham) R.C. Barneby & J.W. Grimes - right embryo and cotyledons.
Hydrochorea
Cotyledon and embryo: H. corymbosa (W.P. Rich) - left embryo and cotyledons; H. marginata (G. Bentham) R.C. Barneby & J.W. Grimes - right embryo and cotyledons.

Testa: H. corymbosa (W.P. Rich) - right testa SEMs; H. marginata (G. Bentham) R.C. Barneby & J.W. Grimes - left testa SEMs. Testa: H. corymbosa (W.P. Rich) - right testa SEMs; H. marginata (G. Bentham) R.C. Barneby & J.W. Grimes - left testa SEMs.
Hydrochorea
Testa: H. corymbosa (W.P. Rich) - right testa SEMs; H. marginata (G. Bentham) R.C. Barneby & J.W. Grimes - left testa SEMs.
Fruit and seed: H. gabunense P.H.W. Taubert - top 3-seeded fruit, center 1-seeded fruits, bottom right 2-seeded fruit, bottom left seed in situ. Fruit and seed: H. gabunense P.H.W. Taubert - top 3-seeded fruit, center 1-seeded fruits, bottom right 2-seeded fruit, bottom left seed in situ.
Hylodendron
Fruit and seed: H. gabunense P.H.W. Taubert - top 3-seeded fruit, center 1-seeded fruits, bottom right 2-seeded fruit, bottom left seed in situ.
Seed, cotyledon, embryo, and testa: H. gabunense P.H.W. Taubert - top left cotyledon split and concealing radicle (L) and embryonic axis (R), bottom far left seed topographies (seed from multiseeded fruit (L) and seed from 1-seeded fruit (R), bottom left center seeds, testa SEMs. Seed, cotyledon, embryo, and testa: H. gabunense P.H.W. Taubert - top left cotyledon split and concealing radicle (L) and embryonic axis (R), bottom far left seed topographies (seed from multiseeded fruit (L) and seed from 1-seeded fruit (R), bottom left center seeds, testa SEMs.
Hylodendron
Seed, cotyledon, embryo, and testa: H. gabunense P.H.W. Taubert - top left cotyledon split and concealing radicle (L) and embryonic axis (R), bottom far left seed topographies (seed from multiseeded fruit (L) and seed from 1-seeded fruit (R), bottom left center seeds, testa SEMs.
Fruit: H. aurea Lee & Langenheim - top right fruit; H. courbaril C. Linnaeus - top left empty fruit, bottom right endocarp segment containing 2 seeds; H. stignocarpa C.F.P. von Martius - bottom left fruit. Fruit: H. aurea Lee & Langenheim - top right fruit; H. courbaril C. Linnaeus - top left empty fruit, bottom right endocarp segment containing 2 seeds; H. stignocarpa C.F.P. von Martius - bottom left fruit.
Hymenaea
Fruit: H. aurea Lee & Langenheim - top right fruit; H. courbaril C. Linnaeus - top left empty fruit, bottom right endocarp segment containing 2 seeds; H. stignocarpa C.F.P. von Martius - bottom left fruit.

Fruit and seed: H. eriogyne G. Bentham - 4th row top seed in situ; H. intermedia W.A. Ducke - 1st row bottom fruit; H. oblongifolia J.E. Huber - 1st row top fruit cluster; H. parvifolia J.E. Huber - 3rd row bottom fruit; H. rubiflora W.A. Ducke - 2nd row fruit; H. torrei Léon - 3rd row top fruit; H. verruosa Gaertner - 4th row bottom fruit. Fruit and seed: H. eriogyne G. Bentham - 4th row top seed in situ; H. intermedia W.A. Ducke - 1st row bottom fruit; H. oblongifolia J.E. Huber - 1st row top fruit cluster; H. parvifolia J.E. Huber - 3rd row bottom fruit; H. rubiflora W.A. Ducke - 2nd row fruit; H. torrei Léon - 3rd row top fruit; H. verruosa Gaertner - 4th row bottom fruit.
Hymenaea
Fruit and seed: H. eriogyne G. Bentham - 4th row top seed in situ; H. intermedia W.A. Ducke - 1st row bottom fruit; H. oblongifolia J.E. Huber - 1st row top fruit cluster; H. parvifolia J.E. Huber - 3rd row bottom fruit; H. rubiflora W.A. Ducke - 2nd row fruit; H. torrei Léon - 3rd row top fruit; H. verruosa Gaertner - 4th row bottom fruit.
Seed: H. courbaril C. Linnaeus - top left seed topography, center top seed; H. hornemanniana D. Dietrich - bottom right seed covered with endocarp tissue; H. parvifolia J.E. Huber - bottom left seed; H. verruosa Gaertner - top right seed topography, bottom center seed in transection. Seed: H. courbaril C. Linnaeus - top left seed topography, center top seed; H. hornemanniana D. Dietrich - bottom right seed covered with endocarp tissue; H. parvifolia J.E. Huber - bottom left seed; H. verruosa Gaertner - top right seed topography, bottom center seed in transection.
Hymenaea
Seed: H. courbaril C. Linnaeus - top left seed topography, center top seed; H. hornemanniana D. Dietrich - bottom right seed covered with endocarp tissue; H. parvifolia J.E. Huber - bottom left seed; H. verruosa Gaertner - top right seed topography, bottom center seed in transection.
Seed, cotyledon, embryo, and testa: H. courbaril C. Linnaeus - top left cotyledon split and concealing radicle (L) and embryonic axis (R); H. verruosa Gaertner - bottom far left cotyledon split and concealing radicle (L) and embryonic axis (R), testa SEMs; H. spp. - bottom left center seeds. Seed, cotyledon, embryo, and testa: H. courbaril C. Linnaeus - top left cotyledon split and concealing radicle (L) and embryonic axis (R); H. verruosa Gaertner - bottom far left cotyledon split and concealing radicle (L) and embryonic axis (R), testa SEMs; H. spp. - bottom left center seeds.
Hymenaea
Seed, cotyledon, embryo, and testa: H. courbaril C. Linnaeus - top left cotyledon split and concealing radicle (L) and embryonic axis (R); H. verruosa Gaertner - bottom far left cotyledon split and concealing radicle (L) and embryonic axis (R), testa SEMs; H. spp. - bottom left center seeds.
Fruit and seed: H. circinnatus (C. Linnaeus) C.G. Savi - fruits and seeds. Fruit and seed: H. circinnatus (C. Linnaeus) C.G. Savi - fruits and seeds.
Hymenocarpos
Fruit and seed: H. circinnatus (C. Linnaeus) C.G. Savi - fruits and seeds.

Cotyledon, embryo, and testa: H. circinnatus (C. Linnaeus) C.G. Savi - embryo, cotyledons, and testa SEMs. Cotyledon, embryo, and testa: H. circinnatus (C. Linnaeus) C.G. Savi - embryo, cotyledons, and testa SEMs.
Hymenocarpos
Cotyledon, embryo, and testa: H. circinnatus (C. Linnaeus) C.G. Savi - embryo, cotyledons, and testa SEMs.
Fruit and seed: H. spp. - fruits and seeds (curved seed apex has damaged testa). Fruit and seed: H. spp. - fruits and seeds (curved seed apex has damaged testa).
Hymenolobium
Fruit and seed: H. spp. - fruits and seeds (curved seed apex has damaged testa).
Cotyledon, embryo, and testa: H. heringerianum C.T. Rizzini - embryo, cotyledons, and testa SEMs. Cotyledon, embryo, and testa: H. heringerianum C.T. Rizzini - embryo, cotyledons, and testa SEMs.
Hymenolobium
Cotyledon, embryo, and testa: H. heringerianum C.T. Rizzini - embryo, cotyledons, and testa SEMs.
Fruit and seed: H. afzelii (D. Oliver) H.A.T. Harms - top left seed in situ; H. floribunda (G. Bentham) H.A.T. Harms - bottom right fruit; H. laxiflora (G. Bentham) H.A.T. Harms - bottom left fruit, top right seed in situ. Fruit and seed: H. afzelii (D. Oliver) H.A.T. Harms - top left seed in situ; H. floribunda (G. Bentham) H.A.T. Harms - bottom right fruit; H. laxiflora (G. Bentham) H.A.T. Harms - bottom left fruit, top right seed in situ.
Hymenostegia
Fruit and seed: H. afzelii (D. Oliver) H.A.T. Harms - top left seed in situ; H. floribunda (G. Bentham) H.A.T. Harms - bottom right fruit; H. laxiflora (G. Bentham) H.A.T. Harms - bottom left fruit, top right seed in situ.