|
|
Nymphoides planosperma Aston
- Aston, H. 1982. New Australian species of Nymphoides Séguier (Menyanthaceae). Muelleria 5: 35-51.
| status
| collector
| date
| locality
| deposited
|
|---|
| holotype
| Craven 6607
| 30 Mar 1981
| Northern Territory, Kakadu National Park, c. 22 km north-east of Jabiru, 12°31'S, 132°58.5'E.
| MEL
| | isotype
|
|
|
| CANB
MEL
|
Nymphoides planosperma Aston
- Aston, H. 1982. New Australian species of Nymphoides Séguier (Menyanthaceae). Muelleria 5: 35-51.
|
Plantae annuae. Laminae foliorum sagittata, ± ovate-triangulares, 8-17 x 9-16 mm, sino profundo acutoque (ad 60(-70%) totae folii longitudinis), lobae basales elongatae, angustae, 2-6 mm latae; laminae infra spongiosae rugosaeque, stellatis trichomis furcateis in cavernis aeriis. Inflorescentia fasciculus pedicellarum densus, ad basin sinu folii ortus. Flores heterostyli, 5-partiti. Corolla 6-10 mm diametro, alba, fauce flavo; lobae cum alis latis lateralibus in distali ½-2/3;, atque fimbria sparsa transversa papillarum tenuium prope lobae basin; alae laterales undulatae ad apicem laciniatae alibi integrae. Capsula ellipsoidea ad late ovoidea, ad 1½ longior quam calyx, 1.5-2.5 x 1.5-2 mm; placentae duae, subapicales, minutae. Semina 1-4 per capsulam, anguste-ellipsoidea sed valde compressa, (1-) 1.42-2.25 x (0.5-) 0.8-1.05 x (0.35-) 0.45-0.6 mm (longitudo latitudine diplolongior, crassitie 3-4 plo longior) nigra maturitate, typice cum superficiebus ± laevibus, cumque margine incrassata, obtusituberculata, rotundata; caruncula crassa, semicircularis, conspicua, in margine seminis circa 1/3 longitudinis ab apice.
|
Annual plant. Laminae of leaves sagittage, ± ovate-triangular, 8-17 x 9-16 mm, with a deep and acute sinus (to 60(-70%) of the total length of the leaf), basal lobes elongate, narrow, 2-6 mm broad. Laminae spongiose and rugose within, with forked, stellate trichomes in air-space cavities. Inflorescence a dense fascicle of pedicels, arising at the base of the leaf sinus. Flowers heterostylous, five-parted. Corolla 6-10 mm in diameter, white, the throat yellow. Lobes with broad lateral wings in the distal 1/2 to 2/3, and a sparse transverse fringe of thin hairs near the base of the lobe. Lateral wings undulate toward the apex, laciniate or entire. Capsule ellipsoid to broadly ovoid, to one and a half times longer than the calyx, 1.5-2.5 x 1.5-2 mm. Two small, subapical placentae. Seeds 1-4 per capsule, narrow-ellipsoid but strongly compressed, (1-) 1.42-2.25 x (0.5-) 0.8-1.05 x (0.35-) 0.45-0.6 mm (length twice longer than the width, 3-4 times longer than the thickness), black at maturity, typically with ± smooth surfaces, and without a thick margin, with obtuse tubercles, round. Caruncle thick, semicircular, conspicuous, on the margin of the seed about one-third of the length to the apex.
|
|
|
