When the aerial stomata are close from morning to the evening, the absorption of materials are doing through the hydathode
1 mm wide, spherical, shiny, yellowish to orangish clear, sessile to stalked; basal basiscopic segment of pinnules becoming decurrent and adnate to the pinna rachises, the vein supplying the segment springing from the pinna rachis instead of the costule; hydathodes
present or (more rarely) absent; indusia absent or (less commonly) present, circular, brown, firm, attached at the base of a sinus, in some species minute and fugacious; spores monolete, nongreen, the perispores cristate or spiny, non-fenestrate or rarely so (2 species); x=41 (Kramer and Green 1990).
2007); (5) type of rhizome (RT), 1 = erect or decumbent, 2 = short, stout, compact, 3 = short, horizontal or ascending, 4 = short-creeping, horizontal, 5 = long-creeping, horizontal; determined by field observations and species descriptions of Mickel and Smith (2004); (6) leaf morphology (LM), classifying the leaf as 1 = monomorphic or 2 = dimorphic; (7) leaf thickness (LT); 1 = thin, 2 = medium or 3 = thick; (8) indusium (IN), classified as 1 = present, 2 = absent, and (9) hydathodes
(HY) classified as 1 = present or 2 = absent for each specimen (Kluge and Kessler, 2007).
leaf such at trichome bases, stomatal openings, hydathodes
Silwet L-77 greatly reduces the surface tension of water, allowing it to infiltrate plant leaf stomata (Neumann & Prinz 1974) and hydathodes
(Zidack et al.
Salt glands in grasses were first mentioned as such in the halophytic genus Spartina (Skelding & Winterbotham, 1939), but they had been previously described as hydathodes
that secreted salt by Sutherland and Eastwood (1916).
To provide a useful framework for future monographic treatments, Mickel and Atehortua (1980) proposed an infrageneric classification based on morphological characters of the sporophytes and spores, including such characters as rhizome habit, phyllopodia, blade scales, presence versus absence of hydathodes
, and perispore morphology.
Equisetum species, like many other plants, have hydathodes
The other feature observed is the absence of hydathodes
on the adaxial surface of the laminae, which strongly suggests that P.
excised leaves showed brown coloration in the hydathodes
Haberlandt (1894) pointed out that hydathodes
and their analogues may also absorb water from the atmosphere.
During a study on the genus Elaphoglossum for Brazil, we found a new species with subulate scales and hydathodes
on the laminar margin, belonging to the "Subulate scales clade", sensu Skog et al.