Cold is the first thing the reader meets in "Wildflower in an Indian Summer": wind that whips "deep into my bones," leaves that are "dying," a walker who is "underfed / under-dressed / & alone." Then the poem turns on a single line, "…but then I thought of you," and the rest becomes a mind keeping itself warm. The central idea is that unreturned love can still be a source of heat. The speaker admits the love "can never be mine," yet claims that "through it all / you will keep me warm."
The opening is built from deprivation. The repeated prefix in "underfed / under-dressed" stacks up shortfalls the way a cold body counts what it lacks, and "alone" lands last, as the worst of them. The ellipsis after it and the one before "but then" make a hinge, a small hesitation between misery and relief. The ampersand in place of "and" gives the voice a hurried, informal, diary-like feel. Nothing in the text says more than that, and it doesn't need to.
The second stanza is a still, indoor picture set against the windy walk: "stretched along the bed, / half-asleep in the half-light." The doubled "half" is more than a pleasing echo. Everything in the memory is partial, and so is the love, which the speaker can picture but not have. The "gorgeous green eyes" bring in the poem's first colour, and the soft g-sounds make the line feel lingering. Notice, though, that the eyes are "filled with a love that can never be mine." The love is real and present in the image, but it is directed elsewhere. The speaker is warmed by something addressed to someone else, which gives the comfort a painful edge.
The third stanza, the poem's best, compresses a whole year into four lines: "Green will bleed orange, / which will scab to black / before the white falls / & claims all colour back." The verbs are bodily. Leaves don't change, they "bleed" and then "scab," as if autumn were a wound healing badly. That links back to the cold in the speaker's bones, so the season and the speaker's body seem to share one injury. "Black" and "back" also form the poem's one clean rhyme, which closes the line with a snap, like a door shutting. The white that "claims all colour back" sounds almost like a conqueror, or like death. Elsewhere the poem is loosely free verse, with only faint chimes such as "bones" and "alone," so this tidy rhyme gives the coming winter an air of finality.
Against that, the last lines make a promise: "you will keep me warm." The poem begins in the past tense ("I was walking home") and ends in the future, so the speaker has moved from reporting a cold evening to making a vow about all the cold evenings ahead. The final line, "my wildflower in an endless Indian Summer," carries the main irony. An Indian summer is a spell of warmth that arrives after autumn has begun, and part of its charm is that it can't last. Calling it "endless" asks for the impossible, which fits a love that is also impossible. A wildflower is uncultivated and unowned, so the word suits someone the speaker cannot claim. It is also hardy, a plant that blooms where nobody planted it. The phrase "my wildflower" is possessive in grammar only; the poem has already said she isn't his.
Nothing about the poet or the date of writing comes with the poem, so its significance rests on what is on the page. It shows how a short, plain-spoken piece can do a lot with a few well-chosen images. It treats unrequited love without self-pity, as a kind of private fuel, and it makes the reader feel the gap between the cold walk home and the warm picture in the speaker's head. The fierce seasonal imagery of the third stanza never defeats the final promise, because the speaker keeps the love alive in imagination instead of owning it. That tension between what is lost and what survives is what lingers after the last line.