biology

Phlox divaricata

Phlox divaricata 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 Phlox divaricata rather than just read about it. In short: Phlox divaricata, the wild blue phlox, woodland phlox, or wild sweet william, is a species of flowering plant in the family Polemoniaceae, native to forests and fields in eastern North America. Etymology The species name divaricata means "with a spreading and straggling habit".

Key takeaways

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

Reference excerpt

Phlox divaricata, the wild blue phlox, woodland phlox, or wild sweet william, is a species of flowering plant in the family Polemoniaceae, native to forests and fields in eastern North America.

Etymology The species name divaricata means "with a spreading and straggling habit".

Description Wild blue phlox is a semi-evergreen perennial growing 25–50 cm (10–20 in) tall with opposite, unstalked, hairy leaves 2.5–5 cm (1–2 in) in length and ovate-lanceolate in shape. Flowers appear in late spring and early summer. They are pleasantly fragrant and 2–4 cm (3⁄4–1+1⁄2 in) in diameter, with five petals fused at the base into a thin tube. The petals are a variety of pastel colors: blue-lavender, light purple, pink, or white. Flowers bloom March to May. It grows in moist, deciduous woods and bluffs. There are two subspecies: ssp. divaricata, with petals notched at the tip, and ssp. laphamii, without a notch.

Ecology Wild blue phlox is most common in the climax successional stage of a community. The flowers produce nectar at the base of the long, narrow corolla tube, and pollen near the end of the corolla tube. Only butterflies, moths, skippers, and long-tongued bees have long enough tongues to drink the nectar. Short-tongued bees and flower flies are unable to reach the nectar, but may gather or feed on pollen. Phlox is self-incompatible, so it requires cross-pollination to produce seed. Butterflies are the most effective pollinators. As they insert their proboscis into the flower to drink nectar, it contacts the anthers and picks up pollen. As they coil the proboscis before moving to the next flower, most of the pollen falls off, but some remains to be transferred to the stigma of the next flower that they drink nectar from.

Cultivation Cultivated varieties have various colours, including blue ('Blue Moon'), lavender ('Clouds of Perfume') and white ('Fuller's White', 'White Perfume'). Phlox divaricata and the lavender-flowered cultivar 'Chattahoochee' have both won the Royal Horticultural Society's Award of Garden Merit.

Gallery

References

External links

Native Plant Database profile, Lady Bird Johnson Wildflower Center, University of Texas at Austin Phlox divaricata in the CalPhotos photo database, University of California, Berkeley Connecticut Botanical Society Kansas Wildflowers and Grasses Missouri Plants Archived 2008-05-13 at the Wayback Machine Virginia Tech Weed Identification Guide BioImages Missouri Botanical Garden IPNI Listing

Illustrations

Worked examples

Example 1 — a first encounter with Phlox divaricata

Start with the simplest possible case. Write down what Phlox divaricata 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 Phlox divaricata 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 Phlox divaricata 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 Phlox divaricata

In research: Phlox divaricata 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 Phlox divaricata 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: Phlox divaricata is common in secondary-school and first-year university syllabi. It links to neighbouring topics Botanical taxa named by Carl Linnaeus, Flora of the North-Central United States, Flora of the Northeastern United States, so understanding it makes those chapters shorter.
In everyday life: Look for Phlox divaricata 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 Phlox divaricata in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Phlox divaricata 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 Phlox divaricata out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Phlox divaricata in simple terms?

Phlox divaricata, the wild blue phlox, woodland phlox, or wild sweet william, is a species of flowering plant in the family Polemoniaceae, native to forests and fields in eastern North America. Etymology The species name divaricata means "with a spreading and straggling habit".

Why does Phlox divaricata 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 Phlox divaricata?

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 Phlox divaricata.