biology

Impatiens pallida

Impatiens pallida is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Impatiens pallida rather than just read about it. In short: Impatiens pallida, with the common names pale jewelweed, or yellow jewelweed, is a flowering annual plant in the family Balsaminaceae native to Canada and the United States. It grows in moist to wet soils, generally alongside the closely related Impatiens capensis, producing flowers from midsummer through fall.

Key takeaways

Impatiens pallida belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Impatiens pallida to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Impatiens pallida from memory before moving on to harder problems.

Reference excerpt

Impatiens pallida, with the common names pale jewelweed, or yellow jewelweed, is a flowering annual plant in the family Balsaminaceae native to Canada and the United States. It grows in moist to wet soils, generally alongside the closely related Impatiens capensis, producing flowers from midsummer through fall.

Description

The plant can grow up to 2 metres (6 ft 7 in) in height. The light green stems branch frequently and are smooth and slightly succulent. Leaves measure up to 10 centimetres (4 in) long and 5 cm (2 in) across and are alternate. They are simple, hairless, ovate, and have teeth on the margins. The flowers are yellow, with reddish-spots on their faces, differentiating the plant from the similar Impatiens capensis, which has orange flowers. They are tube or funnel shaped and 3–4 cm (1–1.5 in) long, with nectar stored at a narrow spur at the back of the flower. The flowers cluster in small quantities among the upper leaves. After blooming, the flowers are replaced by a narrow seed pod up to 3 cm (1 in) long. When the seeds are ripe, they explode from the pod when touched, giving the plant its common name, touch-me-not.

Pollination Nectar spurs are tubular elongations of petals and sepals of certain flowers that usually contain nectar. Flowers of I. pallida have nectar spurs which are thought to have played a role in plant-pollinator coevolution. Most of the nectar spurs of I. pallida are perpendicular but some of them are curved. These nectar spur flowers are either partially or completely pollinated by insects. The specific pollinator is determined by the curvature of the nectar spur. Since I. pallida have perpendicular nectar spurs, bees are the main pollinators.

Distribution and habitat I. pallida is native in the United States from North Dakota to the north and west, Georgia to the south, and Maine to the east. In Canada, it is native in Ontario, Quebec, New Brunswick, Newfoundland, and Nova Scotia. It can be found in wet, soggy soils, such as along ponds and streams, in swamps, in moist deciduous woodlands, and in wet thickets.

Uses Like I. capensis, the young shoots can be boiled (with two changes of water) as a potherb, and the seeds are also edible. Along with other species of jewelweed or "touch-me-not", it is a traditional remedy for skin rashes.

References

Blanchan, Neltje (2005). Wild Flowers Worth Knowing. Project Gutenberg Literary Archive Foundation.

External links

Connecticut Botanical Society: Impatiens pallida Archived 2010-06-13 at the Wayback Machine Plants For A Future: Impatiens pallida USDA Plants Database: Impatiens pallida

Illustrations

Worked examples

Example 1 — a first encounter with Impatiens pallida

Start with the simplest possible case. Write down what Impatiens pallida claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Impatiens pallida before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Impatiens pallida ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Impatiens pallida

In research: Impatiens pallida appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Impatiens pallida in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Impatiens pallida is common in secondary-school and first-year university syllabi. It links to neighbouring topics Flora of Northern America, Impatiens, Medicinal plants of North America, so understanding it makes those chapters shorter.
In everyday life: Look for Impatiens pallida outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Impatiens pallida in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Impatiens pallida means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Impatiens pallida out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Impatiens pallida in simple terms?

Why does Impatiens pallida matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Impatiens pallida?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Impatiens pallida.