Capomos are the flowers of the breadnut tree (Brosimum alicastrum), a plant native to certain regions of Mexico. This word is the central metaphor of the song, which is titled "Flor de Capomo" (Capomo Flower).
In the lyrics, the singer compares the young woman he loves to these beautiful, blossoming flowers. He sings, "linda vas creciendo como los capomos" (you are growing beautifully like the capomos), using this unique piece of natural imagery to express her burgeoning beauty in a truly poetic way.
Flor De Capomo by the Mexican duo Carlos y José is a charming, old-school courtship song with a cheeky streak. The singer is totally infatuated with a young woman, describing her as a "Trigueñita hermosa" (beautiful brunette) who is blossoming like the blooming capomo tree ("como los capomos que se encuentran en la flor"). He is upfront about his intentions, admitting that he is chasing after her with genuine passion: "Te ando enamorando con grande fervor" (I am making you fall in love with great fervor).
What makes this track so fun is the sneaky family dynamic. He plans to drop by her house in a day or two ("Mañana o pasado yo voy a tu casa"), where the mother politely tells her to pull up a chair for him. But instead of keeping things totally proper, he whispers some playful advice to his crush: "finge no mirarme / Ponte muy contenta porque estoy aquí" (pretend not to look at me / get really happy because I am here). Add in a confession that a little wine makes him crave a chat with her ("cuando tomo vino / Siento tantas ganas de contigo platicar"), and you get a straightforward, affectionate picture of small-town flirtation right under the parents' noses.