Savior! I've no one else to tell — Heart-Seed

Savior! I've no one else to tell-1
And so I trouble thee.
I am the one forgot thee so-
Dost thou remember me?
Nor, for myself, I came so far-5
That were the little load-
I brought thee the imperial Heart
I had not strength to hold-
The Heart I carried in my own-9
Till mine too heavy grew-
Yet-strangest-heavier since it went-
Is it too large for you?
(F.295/J.217)
[1] I:: a heart-seed, also called heart-pea.
[7] Heart:: seed of the heart-pea.
[10] heavy grew:: heart-pea growing fast as a weed.
[12] large:: difficult to handle.

Heart-seed, n. A climbing plant with round seeds which are marked with a spot like a heart. ─ An American Dictionary of the English Language (1848)

Heart seed. Balloon pea. A delicate vine with small white flowers. Fence corners etc., 4 miles north of Cincinnati. . . . Possibly not a native. ─ The Western Journal of the Medical and Physical Sciences (1836)