Spring herbs

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Spring herbs
Greater balsam (Impatiens noli-tangere), illustration

Greater balsam ( Impatiens noli-tangere ), illustration

Systematics
Eudicotyledons
Nuclear eudicotyledons
Asterids
Order : Heather-like (Ericales)
Family : Balsamin family (Balsaminaceae)
Genre : Spring herbs
Scientific name
Impatiens
L.

The spring herbs ( Impatiens ) are one of the two genera within the family of the balsamic plants (Balsaminaceae). There are about 1000 species in this family. Hydrocera , the second genus of the family, contains only one species.

description

Impatiens species are usually annual or perennial herbaceous plants from 5 cm to 2.5 meters in size. The stem is usually fleshy to succulent. Some species form woody trunks. The leaves are simple and mostly serrated or curved. Extra-floral nectaries are often present, but stipules are missing.

The hermaphrodite flowers are zygomorphic . The calyx consists of five, not fused sepals, two of which are extremely reduced in most species. In most species, a sepal has been transformed into a petal-like spur in which the nectar is produced. Only one group of Malagasy species has completely reduced the spur. The crown also consists of five petals, the two lateral ones of which are fused together. There is only one circle with five stamens . The stamens are fused together, forming a "cap" which is above the upper permanent ovary sits. The style is short or absent and ends in one to five scars . At the beginning the flowering is in the male phase, after one to several days the overgrown stamens fall off and the female phase begins. This prevents self-pollination in most species.

The capsule fruits are tensioned by the pressure of the cell sap and can tear explosively when touched at pre-formed seams. The seeds are thrown out into the environment ( juice pressure spreader ). This is where the botanical name comes from: Impatiens (Latin) means "impatient, intolerant". The same cause also has the name "touch-me-not-an" of the great balsam ( Impatiens noli-tangere ).

All species of the genus are slightly poisonous when fresh.

Flower biology

The genus Impatiens is characterized by its large variety of flower shapes. Traditionally, a distinction is made between two types of flowers, one with a sagging (sacculate) spur with more or less prominent lower and upper lip, and one with a thread-like (filiform) spur, in which the petals form a flat plane and the spur is evenly narrow and quite long. However, in addition to these two types, there are a number of intermediate forms. In addition, there are more than 120 species in Madagascar without a spur that do not belong to either of the two types. A number of species also have two spurs. It therefore makes more sense to classify the species based on their pollinator groups: such as bees and bumblebees, butterflies, moths, flies and nectar birds. In some species from Madagascar, obligatory Kleistogamy is also common. Most species, however, rely on the activity of pollinators to produce sufficient seeds. However, many species are self-compatible. Many species of the temperate latitudes, as well as some tropical species, which under normal circumstances depend on the activity of pollinators for sufficient seed production, have the ability to form celestogamous flowers when there is a lack of light or nutrients.

distribution

Spring herbs are native to Africa , Eurasia and North America . Two species ( Impatiens turrialbana, I.mexicana ) occur in isolated areas in Central America. The greatest biodiversity can be found in the tropical and subtropical mountainous countries of Central Africa, Madagascar , the Himalayas, the Western Ghats (SW India) and Southeast Asia. In Europe there is only one species, the great balsam ( Impatiens noli-tangere ) originally native. Several other species are firmly naturalized as neophytes .

Orange-red balsam ( Impatiens capensis )
Glandular balsam ( Impatiens glandulifera )
Lesser balsam ( Impatiens parviflora )

Types (selection)

There are about 1000 species in the genus Springkräuter ( Impatiens ). Here is a selection:

More pictures

swell

  • Yilin Chen, Shinobu Akiyama, Hideaki Ohba: Balsaminaceae : Impatiens , p. 43 - online with the same text as the printed work , In: Wu Zheng-yi, Peter H. Raven, Deyuan Hong (eds.): Flora of China. Volume 12: Hippocastanaceae through Theaceae , Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 2007. ISBN 978-1-930723-64-1
  • Walter Erhardt, Erich Götz, Nils Bödeker, Siegmund Seybold: The great pikeperch. Encyclopedia of Plant Names. Volume 2. Types and varieties. Eugen Ulmer, Stuttgart (Hohenheim) 2008, ISBN 978-3-8001-5406-7 .

Individual evidence

  1. ^ Lens, F., Eeckhout, S., Zwartjes, R., Smets, E., Janssens, S .: The multiple fuzzy origins of woodiness within Balsaminaceae using an integrated approach. Where do we draw the line? In: Annals of Botany . tape 109 , 2012, p. 783-799 .
  2. C. Gray Wolson: Impatiens of Africa . AA Balkema, Rotterdam 1980, ISBN 978-90-6191-041-1 .
  3. Fischer, E., Rahelivololona, ME, Abrahamczk, S .: Impatiens galactica (Balsaminaceae), a new species of section spurless Trimorphopetalum from Madagascar . In: Phytotaxa . tape 298 , 2017, p. 269-276 .
  4. Abrahamczyk, S., Lozada-Gobilard, S., Ackermann, M., Fischer, E., Krieger, V., Redling, A., Weigend, M .: A question of data quality - Testing pollination syndromes in Balsaminaceae . In: PLoS One . tape 12 , no. 10 , 2017, p. e0186125 .
  5. Lozada-Gobilard, S., Weigend, M., Fischer, E., Janssens, S., Ackermann, M., Abrahamczyk, S .: Breeding systems in Balsaminaceae in relation to pollen / ovule ratio, pollination syndromes, life history and climate zone . In: Plant Biology . 2018, doi : 10.1111 / plb.12905 .
  6. a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb bc bd be bf bg bh bi bj bk bl bm bn bo bp bq br bs bt bu bv bw bx by bz ca cb cc cd ce cf cg ch ci cj ck cl cm cn co cp cq cr cs ct cu cv cw cx cy cz da db dc dd de df dg dh di dj Impatiens in the Germplasm Resources Information Network (GRIN), USDA , ARS , National Genetic Resources Program. National Germplasm Resources Laboratory, Beltsville, Maryland. Retrieved September 26, 2017.
  7. Abrahamczyk, S., Fischer, E .: Impatiens elianae (Balsaminaceae), a new species from central Madagascar, with notes on the taxonomic relationship of I. lyallii and I. trichoceras . In: Phytotaxa . tape 226 (1) , 2015, pp. 83-91 .

Web links

Commons : Jumping herbs ( Impatiens )  - Collection of images, videos and audio files